From de3393d62b3bef3c83a1f368ab12bc77b0114a87 Mon Sep 17 00:00:00 2001
From: Tom Niget <zippedfire@free.fr>
Date: Fri, 10 May 2024 07:18:08 +0200
Subject: [PATCH] Remove Python 2 handling code (#2098)

* Remove Python 2 update modal

* Remove Python 2 handling code

* Remove backports dependencies

* Remove uses of future and __future__

* Fix import

* Remove requirements

* Update lib folder

* Clean up imports and blank lines

---------

Co-authored-by: JonnyWong16 <9099342+JonnyWong16@users.noreply.github.com>
---
 Tautulli.py                                   |    1 -
 data/interfaces/default/index.html            |   34 -
 .../default/newsletter_preview.html           |    2 +-
 lib/backports/__init__.py                     |    2 +-
 lib/backports/csv.py                          |  979 ------
 lib/backports/functools_lru_cache.py          |  243 --
 lib/backports/tarfile/__init__.py             | 2902 +++++++++++++++++
 lib/backports/tarfile/__main__.py             |    5 +
 .../tarfile}/compat/__init__.py               |    0
 lib/backports/tarfile/compat/py38.py          |   24 +
 lib/future/__init__.py                        |   19 +-
 lib/future/backports/datetime.py              |    2 +-
 .../backports/email/_header_value_parser.py   |    2 +-
 lib/future/backports/email/parser.py          |    4 +-
 lib/future/backports/http/cookiejar.py        |    2 +-
 lib/future/backports/test/support.py          |   32 -
 lib/future/backports/xmlrpc/client.py         |    9 +-
 lib/future/builtins/__init__.py               |    2 +-
 lib/future/moves/_dummy_thread.py             |   11 +-
 lib/future/moves/multiprocessing.py           |    7 +
 lib/future/moves/test/support.py              |    9 +
 lib/future/standard_library/__init__.py       |   14 +-
 lib/future/types/newint.py                    |    8 +-
 lib/future/types/newrange.py                  |    2 +-
 lib/inflect/__init__.py                       |  313 +-
 lib/inflect/compat/pydantic.py                |   19 -
 lib/inflect/compat/pydantic1.py               |    8 -
 lib/jaraco/classes/ancestry.py                |   68 -
 lib/jaraco/classes/meta.py                    |   66 -
 lib/jaraco/classes/properties.py              |  170 -
 lib/jaraco/collections/__init__.py            |   56 +-
 lib/jaraco/context.py                         |  137 +-
 lib/jaraco/functools/__init__.pyi             |    3 -
 lib/libfuturize/fixer_util.py                 |   12 +-
 lib/libfuturize/fixes/fix_metaclass.py        |    4 +-
 lib/libpasteurize/fixes/fix_imports.py        |    1 +
 lib/libpasteurize/fixes/fix_unpacking.py      |    8 +-
 lib/past/__init__.py                          |    4 +-
 lib/past/builtins/misc.py                     |    9 +-
 lib/past/translation/__init__.py              |  258 +-
 lib/typeguard/__init__.py                     |   48 +
 lib/typeguard/_checkers.py                    |  910 ++++++
 lib/typeguard/_config.py                      |  108 +
 lib/typeguard/_decorators.py                  |  235 ++
 lib/typeguard/_exceptions.py                  |   42 +
 lib/typeguard/_functions.py                   |  308 ++
 lib/typeguard/_importhook.py                  |  213 ++
 lib/typeguard/_memo.py                        |   48 +
 lib/typeguard/_pytest_plugin.py               |  126 +
 lib/typeguard/_suppression.py                 |   86 +
 lib/typeguard/_transformer.py                 | 1229 +++++++
 lib/typeguard/_union_transformer.py           |   55 +
 lib/typeguard/_utils.py                       |  163 +
 lib/typeguard/py.typed                        |    0
 lib/typing_extensions.py                      |  203 +-
 plexpy/__init__.py                            |   82 +-
 plexpy/activity_handler.py                    |   27 +-
 plexpy/activity_pinger.py                     |   34 +-
 plexpy/activity_processor.py                  |   24 +-
 plexpy/api2.py                                |   46 +-
 plexpy/classes.py                             |   75 -
 plexpy/common.py                              |    8 +-
 plexpy/config.py                              |   12 +-
 plexpy/database.py                            |   12 +-
 plexpy/datafactory.py                         |   34 +-
 plexpy/datatables.py                          |   14 +-
 plexpy/exceptions.py                          |    2 -
 plexpy/exporter.py                            |   25 +-
 plexpy/graphs.py                              |   27 +-
 plexpy/helpers.py                             |   34 +-
 plexpy/http_handler.py                        |   14 +-
 plexpy/libraries.py                           |   38 +-
 plexpy/lock.py                                |   10 +-
 plexpy/log_reader.py                          |    9 +-
 plexpy/logger.py                              |   12 +-
 plexpy/macos.py                               |   11 +-
 plexpy/mobile_app.py                          |   15 +-
 plexpy/newsletter_handler.py                  |   16 +-
 plexpy/newsletters.py                         |   38 +-
 plexpy/notification_handler.py                |   61 +-
 plexpy/notifiers.py                           |   53 +-
 plexpy/plex.py                                |    9 -
 plexpy/plexivity_import.py                    |   24 +-
 plexpy/plextv.py                              |   33 +-
 plexpy/plexwatch_import.py                    |   21 +-
 plexpy/pmsconnect.py                          |   36 +-
 plexpy/request.py                             |   15 +-
 plexpy/session.py                             |   11 +-
 plexpy/users.py                               |   33 +-
 plexpy/version.py                             |    2 -
 plexpy/versioncheck.py                        |   26 +-
 plexpy/web_socket.py                          |   20 +-
 plexpy/webauth.py                             |   21 +-
 plexpy/webserve.py                            |  119 +-
 plexpy/webstart.py                            |   14 +-
 plexpy/windows.py                             |   12 +-
 requirements.txt                              |    6 +-
 97 files changed, 7443 insertions(+), 2917 deletions(-)
 delete mode 100644 lib/backports/csv.py
 delete mode 100644 lib/backports/functools_lru_cache.py
 create mode 100644 lib/backports/tarfile/__init__.py
 create mode 100644 lib/backports/tarfile/__main__.py
 rename lib/{inflect => backports/tarfile}/compat/__init__.py (100%)
 create mode 100644 lib/backports/tarfile/compat/py38.py
 create mode 100644 lib/future/moves/multiprocessing.py
 delete mode 100644 lib/inflect/compat/pydantic.py
 delete mode 100644 lib/inflect/compat/pydantic1.py
 delete mode 100644 lib/jaraco/classes/ancestry.py
 delete mode 100644 lib/jaraco/classes/meta.py
 delete mode 100644 lib/jaraco/classes/properties.py
 create mode 100644 lib/typeguard/__init__.py
 create mode 100644 lib/typeguard/_checkers.py
 create mode 100644 lib/typeguard/_config.py
 create mode 100644 lib/typeguard/_decorators.py
 create mode 100644 lib/typeguard/_exceptions.py
 create mode 100644 lib/typeguard/_functions.py
 create mode 100644 lib/typeguard/_importhook.py
 create mode 100644 lib/typeguard/_memo.py
 create mode 100644 lib/typeguard/_pytest_plugin.py
 create mode 100644 lib/typeguard/_suppression.py
 create mode 100644 lib/typeguard/_transformer.py
 create mode 100644 lib/typeguard/_union_transformer.py
 create mode 100644 lib/typeguard/_utils.py
 create mode 100644 lib/typeguard/py.typed
 delete mode 100644 plexpy/classes.py

diff --git a/Tautulli.py b/Tautulli.py
index 04a6778e..8616df81 100755
--- a/Tautulli.py
+++ b/Tautulli.py
@@ -23,7 +23,6 @@ import sys
 # Ensure lib added to path, before any other imports
 sys.path.insert(0, os.path.join(os.path.dirname(os.path.abspath(__file__)), 'lib'))
 
-from future.builtins import str
 
 import argparse
 import datetime
diff --git a/data/interfaces/default/index.html b/data/interfaces/default/index.html
index 4a74b2e4..6e4818c7 100644
--- a/data/interfaces/default/index.html
+++ b/data/interfaces/default/index.html
@@ -212,28 +212,6 @@
         </div>
     </div>
 </div>
-<% from plexpy.helpers import anon_url %>
-<div id="python2-modal" class="modal fade wide" tabindex="-1" role="dialog" aria-labelledby="python2-modal">
-    <div class="modal-dialog" role="document">
-        <div class="modal-content">
-            <div class="modal-header">
-                <button type="button" class="close" data-dismiss="modal" aria-hidden="true"><i class="fa fa-remove"></i></button>
-                <h4 class="modal-title">Unable to Update</h4>
-            </div>
-            <div class="modal-body" style="text-align: center;">
-                <p>Tautulli is still running using Python 2 and cannot be updated past v2.6.3.</p>
-                <p>Python 3 is required to continue receiving updates.</p>
-                <p>
-                    <strong>Please see the <a href="${anon_url('https://github.com/Tautulli/Tautulli/wiki/Upgrading-to-Python-3-%28Tautulli-v2.5%29')}" target="_blank" rel="noreferrer">wiki</a>
-                    for instructions on how to upgrade to Python 3.</strong>
-                </p>
-            </div>
-            <div class="modal-footer">
-                <input type="button" class="btn btn-bright" data-dismiss="modal" value="Close">
-            </div>
-        </div>
-    </div>
-</div>
 % endif
 
 <div class="modal fade" id="ip-info-modal" tabindex="-1" role="dialog" aria-labelledby="ip-info-modal">
@@ -1067,16 +1045,4 @@
     });
 </script>
 % endif
-% if _session['user_group'] == 'admin':
-<script>
-    const queryString = window.location.search;
-    const urlParams = new URLSearchParams(queryString);
-    if (urlParams.get('update') === 'python2') {
-        $("#python2-modal").modal({
-                backdrop: 'static',
-                keyboard: false
-        });
-    }
-</script>
-% endif
 </%def>
diff --git a/data/interfaces/default/newsletter_preview.html b/data/interfaces/default/newsletter_preview.html
index 97a9073c..41534d3f 100644
--- a/data/interfaces/default/newsletter_preview.html
+++ b/data/interfaces/default/newsletter_preview.html
@@ -1,5 +1,5 @@
 <%
-    from six.moves.urllib.parse import urlencode
+    from urllib.parse import urlencode
 %>
 <!doctype html>
 
diff --git a/lib/backports/__init__.py b/lib/backports/__init__.py
index 0d1f7edf..8db66d3d 100644
--- a/lib/backports/__init__.py
+++ b/lib/backports/__init__.py
@@ -1 +1 @@
-__path__ = __import__('pkgutil').extend_path(__path__, __name__)  # type: ignore
+__path__ = __import__("pkgutil").extend_path(__path__, __name__)
diff --git a/lib/backports/csv.py b/lib/backports/csv.py
deleted file mode 100644
index 4694a28e..00000000
--- a/lib/backports/csv.py
+++ /dev/null
@@ -1,979 +0,0 @@
-# -*- coding: utf-8 -*-
-"""A port of Python 3's csv module to Python 2.
-
-The API of the csv module in Python 2 is drastically different from
-the csv module in Python 3. This is due, for the most part, to the
-difference between str in Python 2 and Python 3.
-
-The semantics of Python 3's version are more useful because they support
-unicode natively, while Python 2's csv does not.
-"""
-from __future__ import unicode_literals, absolute_import
-
-__all__ = [ "QUOTE_MINIMAL", "QUOTE_ALL", "QUOTE_NONNUMERIC", "QUOTE_NONE",
-            "Error", "Dialect", "__doc__", "excel", "excel_tab",
-            "field_size_limit", "reader", "writer",
-            "register_dialect", "get_dialect", "list_dialects", "Sniffer",
-            "unregister_dialect", "__version__", "DictReader", "DictWriter" ]
-
-import re
-import numbers
-from io import StringIO
-from csv import (
-    QUOTE_MINIMAL, QUOTE_ALL, QUOTE_NONNUMERIC, QUOTE_NONE,
-    __version__, __doc__, Error, field_size_limit,
-)
-
-# Stuff needed from six
-import sys
-PY3 = sys.version_info[0] == 3
-if PY3:
-    string_types = str
-    text_type = str
-    binary_type = bytes
-    unichr = chr
-else:
-    string_types = basestring
-    text_type = unicode
-    binary_type = str
-
-
-class QuoteStrategy(object):
-    quoting = None
-
-    def __init__(self, dialect):
-        if self.quoting is not None:
-            assert dialect.quoting == self.quoting
-        self.dialect = dialect
-        self.setup()
-
-        escape_pattern_quoted = r'({quotechar})'.format(
-            quotechar=re.escape(self.dialect.quotechar or '"'))
-        escape_pattern_unquoted = r'([{specialchars}])'.format(
-            specialchars=re.escape(self.specialchars))
-
-        self.escape_re_quoted = re.compile(escape_pattern_quoted)
-        self.escape_re_unquoted = re.compile(escape_pattern_unquoted)
-
-    def setup(self):
-        """Optional method for strategy-wide optimizations."""
-
-    def quoted(self, field=None, raw_field=None, only=None):
-        """Determine whether this field should be quoted."""
-        raise NotImplementedError(
-            'quoted must be implemented by a subclass')
-
-    @property
-    def specialchars(self):
-        """The special characters that need to be escaped."""
-        raise NotImplementedError(
-            'specialchars must be implemented by a subclass')
-
-    def escape_re(self, quoted=None):
-        if quoted:
-            return self.escape_re_quoted
-        return self.escape_re_unquoted
-
-    def escapechar(self, quoted=None):
-        if quoted and self.dialect.doublequote:
-            return self.dialect.quotechar
-        return self.dialect.escapechar
-
-    def prepare(self, raw_field, only=None):
-        field = text_type(raw_field if raw_field is not None else '')
-        quoted = self.quoted(field=field, raw_field=raw_field, only=only)
-
-        escape_re = self.escape_re(quoted=quoted)
-        escapechar = self.escapechar(quoted=quoted)
-
-        if escape_re.search(field):
-            escapechar = '\\\\' if escapechar == '\\' else escapechar
-            if not escapechar:
-                raise Error('No escapechar is set')
-            escape_replace = r'{escapechar}\1'.format(escapechar=escapechar)
-            field = escape_re.sub(escape_replace, field)
-
-        if quoted:
-            field = '{quotechar}{field}{quotechar}'.format(
-                quotechar=self.dialect.quotechar, field=field)
-
-        return field
-
-
-class QuoteMinimalStrategy(QuoteStrategy):
-    quoting = QUOTE_MINIMAL
-
-    def setup(self):
-        self.quoted_re = re.compile(r'[{specialchars}]'.format(
-            specialchars=re.escape(self.specialchars)))
-
-    @property
-    def specialchars(self):
-        return (
-            self.dialect.lineterminator +
-            self.dialect.quotechar +
-            self.dialect.delimiter +
-            (self.dialect.escapechar or '')
-        )
-
-    def quoted(self, field, only, **kwargs):
-        if field == self.dialect.quotechar and not self.dialect.doublequote:
-            # If the only character in the field is the quotechar, and
-            # doublequote is false, then just escape without outer quotes.
-            return False
-        return field == '' and only or bool(self.quoted_re.search(field))
-
-
-class QuoteAllStrategy(QuoteStrategy):
-    quoting = QUOTE_ALL
-
-    @property
-    def specialchars(self):
-        return self.dialect.quotechar
-
-    def quoted(self, **kwargs):
-        return True
-
-
-class QuoteNonnumericStrategy(QuoteStrategy):
-    quoting = QUOTE_NONNUMERIC
-
-    @property
-    def specialchars(self):
-        return (
-            self.dialect.lineterminator +
-            self.dialect.quotechar +
-            self.dialect.delimiter +
-            (self.dialect.escapechar or '')
-        )
-
-    def quoted(self, raw_field, **kwargs):
-        return not isinstance(raw_field, numbers.Number)
-
-
-class QuoteNoneStrategy(QuoteStrategy):
-    quoting = QUOTE_NONE
-
-    @property
-    def specialchars(self):
-        return (
-            self.dialect.lineterminator +
-            (self.dialect.quotechar or '') +
-            self.dialect.delimiter +
-            (self.dialect.escapechar or '')
-        )
-
-    def quoted(self, field, only, **kwargs):
-        if field == '' and only:
-            raise Error('single empty field record must be quoted')
-        return False
-
-
-class writer(object):
-    def __init__(self, fileobj, dialect='excel', **fmtparams):
-        if fileobj is None:
-            raise TypeError('fileobj must be file-like, not None')
-
-        self.fileobj = fileobj
-
-        if isinstance(dialect, text_type):
-            dialect = get_dialect(dialect)
-
-        try:
-            self.dialect = Dialect.combine(dialect, fmtparams)
-        except Error as e:
-            raise TypeError(*e.args)
-
-        strategies = {
-            QUOTE_MINIMAL: QuoteMinimalStrategy,
-            QUOTE_ALL: QuoteAllStrategy,
-            QUOTE_NONNUMERIC: QuoteNonnumericStrategy,
-            QUOTE_NONE: QuoteNoneStrategy,
-        }
-        self.strategy = strategies[self.dialect.quoting](self.dialect)
-
-    def writerow(self, row):
-        if row is None:
-            raise Error('row must be an iterable')
-
-        row = list(row)
-        only = len(row) == 1
-        row = [self.strategy.prepare(field, only=only) for field in row]
-
-        line = self.dialect.delimiter.join(row) + self.dialect.lineterminator
-        return self.fileobj.write(line)
-
-    def writerows(self, rows):
-        for row in rows:
-            self.writerow(row)
-
-
-START_RECORD = 0
-START_FIELD = 1
-ESCAPED_CHAR = 2
-IN_FIELD = 3
-IN_QUOTED_FIELD = 4
-ESCAPE_IN_QUOTED_FIELD = 5
-QUOTE_IN_QUOTED_FIELD = 6
-EAT_CRNL = 7
-AFTER_ESCAPED_CRNL = 8
-
-
-class reader(object):
-    def __init__(self, fileobj, dialect='excel', **fmtparams):
-        self.input_iter = iter(fileobj)
-
-        if isinstance(dialect, text_type):
-            dialect = get_dialect(dialect)
-
-        try:
-            self.dialect = Dialect.combine(dialect, fmtparams)
-        except Error as e:
-            raise TypeError(*e.args)
-
-        self.fields = None
-        self.field = None
-        self.line_num = 0
-
-    def parse_reset(self):
-        self.fields = []
-        self.field = []
-        self.state = START_RECORD
-        self.numeric_field = False
-
-    def parse_save_field(self):
-        field = ''.join(self.field)
-        self.field = []
-        if self.numeric_field:
-            field = float(field)
-            self.numeric_field = False
-        self.fields.append(field)
-
-    def parse_add_char(self, c):
-        if len(self.field) >= field_size_limit():
-            raise Error('field size limit exceeded')
-        self.field.append(c)
-
-    def parse_process_char(self, c):
-        switch = {
-            START_RECORD: self._parse_start_record,
-            START_FIELD: self._parse_start_field,
-            ESCAPED_CHAR: self._parse_escaped_char,
-            AFTER_ESCAPED_CRNL: self._parse_after_escaped_crnl,
-            IN_FIELD: self._parse_in_field,
-            IN_QUOTED_FIELD: self._parse_in_quoted_field,
-            ESCAPE_IN_QUOTED_FIELD: self._parse_escape_in_quoted_field,
-            QUOTE_IN_QUOTED_FIELD: self._parse_quote_in_quoted_field,
-            EAT_CRNL: self._parse_eat_crnl,
-        }
-        return switch[self.state](c)
-
-    def _parse_start_record(self, c):
-        if c == '\0':
-            return
-        elif c == '\n' or c == '\r':
-            self.state = EAT_CRNL
-            return
-
-        self.state = START_FIELD
-        return self._parse_start_field(c)
-
-    def _parse_start_field(self, c):
-        if c == '\n' or c == '\r' or c == '\0':
-            self.parse_save_field()
-            self.state = START_RECORD if c == '\0' else EAT_CRNL
-        elif (c == self.dialect.quotechar and
-              self.dialect.quoting != QUOTE_NONE):
-            self.state = IN_QUOTED_FIELD
-        elif c == self.dialect.escapechar:
-            self.state = ESCAPED_CHAR
-        elif c == ' ' and self.dialect.skipinitialspace:
-            pass  # Ignore space at start of field
-        elif c == self.dialect.delimiter:
-            # Save empty field
-            self.parse_save_field()
-        else:
-            # Begin new unquoted field
-            if self.dialect.quoting == QUOTE_NONNUMERIC:
-                self.numeric_field = True
-            self.parse_add_char(c)
-            self.state = IN_FIELD
-
-    def _parse_escaped_char(self, c):
-        if c == '\n' or c == '\r':
-            self.parse_add_char(c)
-            self.state = AFTER_ESCAPED_CRNL
-            return
-        if c == '\0':
-            c = '\n'
-        self.parse_add_char(c)
-        self.state = IN_FIELD
-
-    def _parse_after_escaped_crnl(self, c):
-        if c == '\0':
-            return
-        return self._parse_in_field(c)
-
-    def _parse_in_field(self, c):
-        # In unquoted field
-        if c == '\n' or c == '\r' or c == '\0':
-            # End of line - return [fields]
-            self.parse_save_field()
-            self.state = START_RECORD if c == '\0' else EAT_CRNL
-        elif c == self.dialect.escapechar:
-            self.state = ESCAPED_CHAR
-        elif c == self.dialect.delimiter:
-            self.parse_save_field()
-            self.state = START_FIELD
-        else:
-            # Normal character - save in field
-            self.parse_add_char(c)
-
-    def _parse_in_quoted_field(self, c):
-        if c == '\0':
-            pass
-        elif c == self.dialect.escapechar:
-            self.state = ESCAPE_IN_QUOTED_FIELD
-        elif (c == self.dialect.quotechar and
-              self.dialect.quoting != QUOTE_NONE):
-            if self.dialect.doublequote:
-                self.state = QUOTE_IN_QUOTED_FIELD
-            else:
-                self.state = IN_FIELD
-        else:
-            self.parse_add_char(c)
-
-    def _parse_escape_in_quoted_field(self, c):
-        if c == '\0':
-            c = '\n'
-
-        self.parse_add_char(c)
-        self.state = IN_QUOTED_FIELD
-
-    def _parse_quote_in_quoted_field(self, c):
-        if (self.dialect.quoting != QUOTE_NONE and
-                c == self.dialect.quotechar):
-            # save "" as "
-            self.parse_add_char(c)
-            self.state = IN_QUOTED_FIELD
-        elif c == self.dialect.delimiter:
-            self.parse_save_field()
-            self.state = START_FIELD
-        elif c == '\n' or c == '\r' or c == '\0':
-            # End of line = return [fields]
-            self.parse_save_field()
-            self.state = START_RECORD if c == '\0' else EAT_CRNL
-        elif not self.dialect.strict:
-            self.parse_add_char(c)
-            self.state = IN_FIELD
-        else:
-            # illegal
-            raise Error("{delimiter}' expected after '{quotechar}".format(
-                delimiter=self.dialect.delimiter,
-                quotechar=self.dialect.quotechar,
-            ))
-
-    def _parse_eat_crnl(self, c):
-        if c == '\n' or c == '\r':
-            pass
-        elif c == '\0':
-            self.state = START_RECORD
-        else:
-            raise Error('new-line character seen in unquoted field - do you '
-                        'need to open the file in universal-newline mode?')
-
-
-    def __iter__(self):
-        return self
-
-    def __next__(self):
-        self.parse_reset()
-
-        while True:
-            try:
-                lineobj = next(self.input_iter)
-            except StopIteration:
-                if len(self.field) != 0 or self.state == IN_QUOTED_FIELD:
-                    if self.dialect.strict:
-                        raise Error('unexpected end of data')
-                    self.parse_save_field()
-                if self.fields:
-                    break
-                raise
-
-            if not isinstance(lineobj, text_type):
-                typ = type(lineobj)
-                typ_name = 'bytes' if typ == bytes else typ.__name__
-                err_str = ('iterator should return strings, not {0}'
-                           ' (did you open the file in text mode?)')
-                raise Error(err_str.format(typ_name))
-
-            self.line_num += 1
-            for c in lineobj:
-                if c == '\0':
-                    raise Error('line contains NULL byte')
-                self.parse_process_char(c)
-
-            self.parse_process_char('\0')
-
-            if self.state == START_RECORD:
-                break
-
-        fields = self.fields
-        self.fields = None
-        return fields
-
-    next = __next__
-
-
-_dialect_registry = {}
-def register_dialect(name, dialect='excel', **fmtparams):
-    if not isinstance(name, text_type):
-        raise TypeError('"name" must be a string')
-
-    dialect = Dialect.extend(dialect, fmtparams)
-
-    try:
-        Dialect.validate(dialect)
-    except:
-        raise TypeError('dialect is invalid')
-
-    assert name not in _dialect_registry
-    _dialect_registry[name] = dialect
-
-def unregister_dialect(name):
-    try:
-        _dialect_registry.pop(name)
-    except KeyError:
-        raise Error('"{name}" not a registered dialect'.format(name=name))
-
-def get_dialect(name):
-    try:
-        return _dialect_registry[name]
-    except KeyError:
-        raise Error('Could not find dialect {0}'.format(name))
-
-def list_dialects():
-    return list(_dialect_registry)
-
-
-class Dialect(object):
-    """Describe a CSV dialect.
-    This must be subclassed (see csv.excel).  Valid attributes are:
-    delimiter, quotechar, escapechar, doublequote, skipinitialspace,
-    lineterminator, quoting, strict.
-    """
-    _name = ""
-    _valid = False
-    # placeholders
-    delimiter = None
-    quotechar = None
-    escapechar = None
-    doublequote = None
-    skipinitialspace = None
-    lineterminator = None
-    quoting = None
-    strict = None
-
-    def __init__(self):
-        self.validate(self)
-        if self.__class__ != Dialect:
-            self._valid = True
-
-    @classmethod
-    def validate(cls, dialect):
-        dialect = cls.extend(dialect)
-
-        if not isinstance(dialect.quoting, int):
-            raise Error('"quoting" must be an integer')
-
-        if dialect.delimiter is None:
-            raise Error('delimiter must be set')
-        cls.validate_text(dialect, 'delimiter')
-
-        if dialect.lineterminator is None:
-            raise Error('lineterminator must be set')
-        if not isinstance(dialect.lineterminator, text_type):
-            raise Error('"lineterminator" must be a string')
-
-        if dialect.quoting not in [
-                QUOTE_NONE, QUOTE_MINIMAL, QUOTE_NONNUMERIC, QUOTE_ALL]:
-            raise Error('Invalid quoting specified')
-
-        if dialect.quoting != QUOTE_NONE:
-            if dialect.quotechar is None and dialect.escapechar is None:
-                raise Error('quotechar must be set if quoting enabled')
-            if dialect.quotechar is not None:
-                cls.validate_text(dialect, 'quotechar')
-
-    @staticmethod
-    def validate_text(dialect, attr):
-        val = getattr(dialect, attr)
-        if not isinstance(val, text_type):
-            if type(val) == bytes:
-                raise Error('"{0}" must be string, not bytes'.format(attr))
-            raise Error('"{0}" must be string, not {1}'.format(
-                attr, type(val).__name__))
-
-        if len(val) != 1:
-            raise Error('"{0}" must be a 1-character string'.format(attr))
-
-    @staticmethod
-    def defaults():
-        return {
-            'delimiter': ',',
-            'doublequote': True,
-            'escapechar': None,
-            'lineterminator': '\r\n',
-            'quotechar': '"',
-            'quoting': QUOTE_MINIMAL,
-            'skipinitialspace': False,
-            'strict': False,
-        }
-
-    @classmethod
-    def extend(cls, dialect, fmtparams=None):
-        if isinstance(dialect, string_types):
-            dialect = get_dialect(dialect)
-
-        if fmtparams is None:
-            return dialect
-
-        defaults = cls.defaults()
-
-        if any(param not in defaults for param in fmtparams):
-            raise TypeError('Invalid fmtparam')
-
-        specified = dict(
-            (attr, getattr(dialect, attr, None))
-            for attr in cls.defaults()
-        )
-
-        specified.update(fmtparams)
-        return type(str('ExtendedDialect'), (cls,), specified)
-
-    @classmethod
-    def combine(cls, dialect, fmtparams):
-        """Create a new dialect with defaults and added parameters."""
-        dialect = cls.extend(dialect, fmtparams)
-        defaults = cls.defaults()
-        specified = dict(
-            (attr, getattr(dialect, attr, None))
-            for attr in defaults
-            if getattr(dialect, attr, None) is not None or
-                attr in ['quotechar', 'delimiter', 'lineterminator', 'quoting']
-        )
-
-        defaults.update(specified)
-        dialect = type(str('CombinedDialect'), (cls,), defaults)
-        cls.validate(dialect)
-        return dialect()
-
-    def __delattr__(self, attr):
-        if self._valid:
-            raise AttributeError('dialect is immutable.')
-        super(Dialect, self).__delattr__(attr)
-
-    def __setattr__(self, attr, value):
-        if self._valid:
-            raise AttributeError('dialect is immutable.')
-        super(Dialect, self).__setattr__(attr, value)
-
-
-class excel(Dialect):
-    """Describe the usual properties of Excel-generated CSV files."""
-    delimiter = ','
-    quotechar = '"'
-    doublequote = True
-    skipinitialspace = False
-    lineterminator = '\r\n'
-    quoting = QUOTE_MINIMAL
-register_dialect("excel", excel)
-
-class excel_tab(excel):
-    """Describe the usual properties of Excel-generated TAB-delimited files."""
-    delimiter = '\t'
-register_dialect("excel-tab", excel_tab)
-
-class unix_dialect(Dialect):
-    """Describe the usual properties of Unix-generated CSV files."""
-    delimiter = ','
-    quotechar = '"'
-    doublequote = True
-    skipinitialspace = False
-    lineterminator = '\n'
-    quoting = QUOTE_ALL
-register_dialect("unix", unix_dialect)
-
-
-class DictReader(object):
-    def __init__(self, f, fieldnames=None, restkey=None, restval=None,
-                 dialect="excel", *args, **kwds):
-        self._fieldnames = fieldnames   # list of keys for the dict
-        self.restkey = restkey          # key to catch long rows
-        self.restval = restval          # default value for short rows
-        self.reader = reader(f, dialect, *args, **kwds)
-        self.dialect = dialect
-        self.line_num = 0
-
-    def __iter__(self):
-        return self
-
-    @property
-    def fieldnames(self):
-        if self._fieldnames is None:
-            try:
-                self._fieldnames = next(self.reader)
-            except StopIteration:
-                pass
-        self.line_num = self.reader.line_num
-        return self._fieldnames
-
-    @fieldnames.setter
-    def fieldnames(self, value):
-        self._fieldnames = value
-
-    def __next__(self):
-        if self.line_num == 0:
-            # Used only for its side effect.
-            self.fieldnames
-        row = next(self.reader)
-        self.line_num = self.reader.line_num
-
-        # unlike the basic reader, we prefer not to return blanks,
-        # because we will typically wind up with a dict full of None
-        # values
-        while row == []:
-            row = next(self.reader)
-        d = dict(zip(self.fieldnames, row))
-        lf = len(self.fieldnames)
-        lr = len(row)
-        if lf < lr:
-            d[self.restkey] = row[lf:]
-        elif lf > lr:
-            for key in self.fieldnames[lr:]:
-                d[key] = self.restval
-        return d
-
-    next = __next__
-
-
-class DictWriter(object):
-    def __init__(self, f, fieldnames, restval="", extrasaction="raise",
-                 dialect="excel", *args, **kwds):
-        self.fieldnames = fieldnames    # list of keys for the dict
-        self.restval = restval          # for writing short dicts
-        if extrasaction.lower() not in ("raise", "ignore"):
-            raise ValueError("extrasaction (%s) must be 'raise' or 'ignore'"
-                             % extrasaction)
-        self.extrasaction = extrasaction
-        self.writer = writer(f, dialect, *args, **kwds)
-
-    def writeheader(self):
-        header = dict(zip(self.fieldnames, self.fieldnames))
-        self.writerow(header)
-
-    def _dict_to_list(self, rowdict):
-        if self.extrasaction == "raise":
-            wrong_fields = [k for k in rowdict if k not in self.fieldnames]
-            if wrong_fields:
-                raise ValueError("dict contains fields not in fieldnames: "
-                                 + ", ".join([repr(x) for x in wrong_fields]))
-        return (rowdict.get(key, self.restval) for key in self.fieldnames)
-
-    def writerow(self, rowdict):
-        return self.writer.writerow(self._dict_to_list(rowdict))
-
-    def writerows(self, rowdicts):
-        return self.writer.writerows(map(self._dict_to_list, rowdicts))
-
-# Guard Sniffer's type checking against builds that exclude complex()
-try:
-    complex
-except NameError:
-    complex = float
-
-class Sniffer(object):
-    '''
-    "Sniffs" the format of a CSV file (i.e. delimiter, quotechar)
-    Returns a Dialect object.
-    '''
-    def __init__(self):
-        # in case there is more than one possible delimiter
-        self.preferred = [',', '\t', ';', ' ', ':']
-
-
-    def sniff(self, sample, delimiters=None):
-        """
-        Returns a dialect (or None) corresponding to the sample
-        """
-
-        quotechar, doublequote, delimiter, skipinitialspace = \
-                   self._guess_quote_and_delimiter(sample, delimiters)
-        if not delimiter:
-            delimiter, skipinitialspace = self._guess_delimiter(sample,
-                                                                delimiters)
-
-        if not delimiter:
-            raise Error("Could not determine delimiter")
-
-        class dialect(Dialect):
-            _name = "sniffed"
-            lineterminator = '\r\n'
-            quoting = QUOTE_MINIMAL
-            # escapechar = ''
-
-        dialect.doublequote = doublequote
-        dialect.delimiter = delimiter
-        # _csv.reader won't accept a quotechar of ''
-        dialect.quotechar = quotechar or '"'
-        dialect.skipinitialspace = skipinitialspace
-
-        return dialect
-
-
-    def _guess_quote_and_delimiter(self, data, delimiters):
-        """
-        Looks for text enclosed between two identical quotes
-        (the probable quotechar) which are preceded and followed
-        by the same character (the probable delimiter).
-        For example:
-                         ,'some text',
-        The quote with the most wins, same with the delimiter.
-        If there is no quotechar the delimiter can't be determined
-        this way.
-        """
-
-        matches = []
-        for restr in ('(?P<delim>[^\w\n"\'])(?P<space> ?)(?P<quote>["\']).*?(?P=quote)(?P=delim)', # ,".*?",
-                      '(?:^|\n)(?P<quote>["\']).*?(?P=quote)(?P<delim>[^\w\n"\'])(?P<space> ?)',   #  ".*?",
-                      '(?P<delim>>[^\w\n"\'])(?P<space> ?)(?P<quote>["\']).*?(?P=quote)(?:$|\n)',  # ,".*?"
-                      '(?:^|\n)(?P<quote>["\']).*?(?P=quote)(?:$|\n)'):                            #  ".*?" (no delim, no space)
-            regexp = re.compile(restr, re.DOTALL | re.MULTILINE)
-            matches = regexp.findall(data)
-            if matches:
-                break
-
-        if not matches:
-            # (quotechar, doublequote, delimiter, skipinitialspace)
-            return ('', False, None, 0)
-        quotes = {}
-        delims = {}
-        spaces = 0
-        groupindex = regexp.groupindex
-        for m in matches:
-            n = groupindex['quote'] - 1
-            key = m[n]
-            if key:
-                quotes[key] = quotes.get(key, 0) + 1
-            try:
-                n = groupindex['delim'] - 1
-                key = m[n]
-            except KeyError:
-                continue
-            if key and (delimiters is None or key in delimiters):
-                delims[key] = delims.get(key, 0) + 1
-            try:
-                n = groupindex['space'] - 1
-            except KeyError:
-                continue
-            if m[n]:
-                spaces += 1
-
-        quotechar = max(quotes, key=quotes.get)
-
-        if delims:
-            delim = max(delims, key=delims.get)
-            skipinitialspace = delims[delim] == spaces
-            if delim == '\n': # most likely a file with a single column
-                delim = ''
-        else:
-            # there is *no* delimiter, it's a single column of quoted data
-            delim = ''
-            skipinitialspace = 0
-
-        # if we see an extra quote between delimiters, we've got a
-        # double quoted format
-        dq_regexp = re.compile(
-                               r"((%(delim)s)|^)\W*%(quote)s[^%(delim)s\n]*%(quote)s[^%(delim)s\n]*%(quote)s\W*((%(delim)s)|$)" % \
-                               {'delim':re.escape(delim), 'quote':quotechar}, re.MULTILINE)
-
-
-
-        if dq_regexp.search(data):
-            doublequote = True
-        else:
-            doublequote = False
-
-        return (quotechar, doublequote, delim, skipinitialspace)
-
-
-    def _guess_delimiter(self, data, delimiters):
-        """
-        The delimiter /should/ occur the same number of times on
-        each row. However, due to malformed data, it may not. We don't want
-        an all or nothing approach, so we allow for small variations in this
-        number.
-          1) build a table of the frequency of each character on every line.
-          2) build a table of frequencies of this frequency (meta-frequency?),
-             e.g.  'x occurred 5 times in 10 rows, 6 times in 1000 rows,
-             7 times in 2 rows'
-          3) use the mode of the meta-frequency to determine the /expected/
-             frequency for that character
-          4) find out how often the character actually meets that goal
-          5) the character that best meets its goal is the delimiter
-        For performance reasons, the data is evaluated in chunks, so it can
-        try and evaluate the smallest portion of the data possible, evaluating
-        additional chunks as necessary.
-        """
-
-        data = list(filter(None, data.split('\n')))
-
-        ascii = [unichr(c) for c in range(127)] # 7-bit ASCII
-
-        # build frequency tables
-        chunkLength = min(10, len(data))
-        iteration = 0
-        charFrequency = {}
-        modes = {}
-        delims = {}
-        start, end = 0, min(chunkLength, len(data))
-        while start < len(data):
-            iteration += 1
-            for line in data[start:end]:
-                for char in ascii:
-                    metaFrequency = charFrequency.get(char, {})
-                    # must count even if frequency is 0
-                    freq = line.count(char)
-                    # value is the mode
-                    metaFrequency[freq] = metaFrequency.get(freq, 0) + 1
-                    charFrequency[char] = metaFrequency
-
-            for char in charFrequency.keys():
-                items = list(charFrequency[char].items())
-                if len(items) == 1 and items[0][0] == 0:
-                    continue
-                # get the mode of the frequencies
-                if len(items) > 1:
-                    modes[char] = max(items, key=lambda x: x[1])
-                    # adjust the mode - subtract the sum of all
-                    # other frequencies
-                    items.remove(modes[char])
-                    modes[char] = (modes[char][0], modes[char][1]
-                                   - sum(item[1] for item in items))
-                else:
-                    modes[char] = items[0]
-
-            # build a list of possible delimiters
-            modeList = modes.items()
-            total = float(chunkLength * iteration)
-            # (rows of consistent data) / (number of rows) = 100%
-            consistency = 1.0
-            # minimum consistency threshold
-            threshold = 0.9
-            while len(delims) == 0 and consistency >= threshold:
-                for k, v in modeList:
-                    if v[0] > 0 and v[1] > 0:
-                        if ((v[1]/total) >= consistency and
-                            (delimiters is None or k in delimiters)):
-                            delims[k] = v
-                consistency -= 0.01
-
-            if len(delims) == 1:
-                delim = list(delims.keys())[0]
-                skipinitialspace = (data[0].count(delim) ==
-                                    data[0].count("%c " % delim))
-                return (delim, skipinitialspace)
-
-            # analyze another chunkLength lines
-            start = end
-            end += chunkLength
-
-        if not delims:
-            return ('', 0)
-
-        # if there's more than one, fall back to a 'preferred' list
-        if len(delims) > 1:
-            for d in self.preferred:
-                if d in delims.keys():
-                    skipinitialspace = (data[0].count(d) ==
-                                        data[0].count("%c " % d))
-                    return (d, skipinitialspace)
-
-        # nothing else indicates a preference, pick the character that
-        # dominates(?)
-        items = [(v,k) for (k,v) in delims.items()]
-        items.sort()
-        delim = items[-1][1]
-
-        skipinitialspace = (data[0].count(delim) ==
-                            data[0].count("%c " % delim))
-        return (delim, skipinitialspace)
-
-
-    def has_header(self, sample):
-        # Creates a dictionary of types of data in each column. If any
-        # column is of a single type (say, integers), *except* for the first
-        # row, then the first row is presumed to be labels. If the type
-        # can't be determined, it is assumed to be a string in which case
-        # the length of the string is the determining factor: if all of the
-        # rows except for the first are the same length, it's a header.
-        # Finally, a 'vote' is taken at the end for each column, adding or
-        # subtracting from the likelihood of the first row being a header.
-
-        rdr = reader(StringIO(sample), self.sniff(sample))
-
-        header = next(rdr) # assume first row is header
-
-        columns = len(header)
-        columnTypes = {}
-        for i in range(columns): columnTypes[i] = None
-
-        checked = 0
-        for row in rdr:
-            # arbitrary number of rows to check, to keep it sane
-            if checked > 20:
-                break
-            checked += 1
-
-            if len(row) != columns:
-                continue # skip rows that have irregular number of columns
-
-            for col in list(columnTypes.keys()):
-
-                for thisType in [int, float, complex]:
-                    try:
-                        thisType(row[col])
-                        break
-                    except (ValueError, OverflowError):
-                        pass
-                else:
-                    # fallback to length of string
-                    thisType = len(row[col])
-
-                if thisType != columnTypes[col]:
-                    if columnTypes[col] is None: # add new column type
-                        columnTypes[col] = thisType
-                    else:
-                        # type is inconsistent, remove column from
-                        # consideration
-                        del columnTypes[col]
-
-        # finally, compare results against first row and "vote"
-        # on whether it's a header
-        hasHeader = 0
-        for col, colType in columnTypes.items():
-            if type(colType) == type(0): # it's a length
-                if len(header[col]) != colType:
-                    hasHeader += 1
-                else:
-                    hasHeader -= 1
-            else: # attempt typecast
-                try:
-                    colType(header[col])
-                except (ValueError, TypeError):
-                    hasHeader += 1
-                else:
-                    hasHeader -= 1
-
-        return hasHeader > 0
diff --git a/lib/backports/functools_lru_cache.py b/lib/backports/functools_lru_cache.py
deleted file mode 100644
index e372cff3..00000000
--- a/lib/backports/functools_lru_cache.py
+++ /dev/null
@@ -1,243 +0,0 @@
-from __future__ import absolute_import
-
-import functools
-from collections import namedtuple
-from threading import RLock
-
-_CacheInfo = namedtuple("_CacheInfo", ["hits", "misses", "maxsize", "currsize"])
-
-
-@functools.wraps(functools.update_wrapper)
-def update_wrapper(
-    wrapper,
-    wrapped,
-    assigned=functools.WRAPPER_ASSIGNMENTS,
-    updated=functools.WRAPPER_UPDATES,
-):
-    """
-    Patch two bugs in functools.update_wrapper.
-    """
-    # workaround for http://bugs.python.org/issue3445
-    assigned = tuple(attr for attr in assigned if hasattr(wrapped, attr))
-    wrapper = functools.update_wrapper(wrapper, wrapped, assigned, updated)
-    # workaround for https://bugs.python.org/issue17482
-    wrapper.__wrapped__ = wrapped
-    return wrapper
-
-
-class _HashedSeq(list):
-    """This class guarantees that hash() will be called no more than once
-    per element.  This is important because the lru_cache() will hash
-    the key multiple times on a cache miss.
-
-    """
-
-    __slots__ = 'hashvalue'
-
-    def __init__(self, tup, hash=hash):
-        self[:] = tup
-        self.hashvalue = hash(tup)
-
-    def __hash__(self):
-        return self.hashvalue
-
-
-def _make_key(
-    args,
-    kwds,
-    typed,
-    kwd_mark=(object(),),
-    fasttypes={int, str},
-    tuple=tuple,
-    type=type,
-    len=len,
-):
-    """Make a cache key from optionally typed positional and keyword arguments
-
-    The key is constructed in a way that is flat as possible rather than
-    as a nested structure that would take more memory.
-
-    If there is only a single argument and its data type is known to cache
-    its hash value, then that argument is returned without a wrapper.  This
-    saves space and improves lookup speed.
-
-    """
-    # All of code below relies on kwds preserving the order input by the user.
-    # Formerly, we sorted() the kwds before looping.  The new way is *much*
-    # faster; however, it means that f(x=1, y=2) will now be treated as a
-    # distinct call from f(y=2, x=1) which will be cached separately.
-    key = args
-    if kwds:
-        key += kwd_mark
-        for item in kwds.items():
-            key += item
-    if typed:
-        key += tuple(type(v) for v in args)
-        if kwds:
-            key += tuple(type(v) for v in kwds.values())
-    elif len(key) == 1 and type(key[0]) in fasttypes:
-        return key[0]
-    return _HashedSeq(key)
-
-
-def lru_cache(maxsize=128, typed=False):
-    """Least-recently-used cache decorator.
-
-    If *maxsize* is set to None, the LRU features are disabled and the cache
-    can grow without bound.
-
-    If *typed* is True, arguments of different types will be cached separately.
-    For example, f(decimal.Decimal("3.0")) and f(3.0) will be treated as
-    distinct calls with distinct results. Some types such as str and int may
-    be cached separately even when typed is false.
-
-    Arguments to the cached function must be hashable.
-
-    View the cache statistics named tuple (hits, misses, maxsize, currsize)
-    with f.cache_info().  Clear the cache and statistics with f.cache_clear().
-    Access the underlying function with f.__wrapped__.
-
-    See:  https://en.wikipedia.org/wiki/Cache_replacement_policies#Least_recently_used_(LRU)
-
-    """
-
-    # Users should only access the lru_cache through its public API:
-    #       cache_info, cache_clear, and f.__wrapped__
-    # The internals of the lru_cache are encapsulated for thread safety and
-    # to allow the implementation to change (including a possible C version).
-
-    if isinstance(maxsize, int):
-        # Negative maxsize is treated as 0
-        if maxsize < 0:
-            maxsize = 0
-    elif callable(maxsize) and isinstance(typed, bool):
-        # The user_function was passed in directly via the maxsize argument
-        user_function, maxsize = maxsize, 128
-        wrapper = _lru_cache_wrapper(user_function, maxsize, typed, _CacheInfo)
-        wrapper.cache_parameters = lambda: {'maxsize': maxsize, 'typed': typed}
-        return update_wrapper(wrapper, user_function)
-    elif maxsize is not None:
-        raise TypeError('Expected first argument to be an integer, a callable, or None')
-
-    def decorating_function(user_function):
-        wrapper = _lru_cache_wrapper(user_function, maxsize, typed, _CacheInfo)
-        wrapper.cache_parameters = lambda: {'maxsize': maxsize, 'typed': typed}
-        return update_wrapper(wrapper, user_function)
-
-    return decorating_function
-
-
-def _lru_cache_wrapper(user_function, maxsize, typed, _CacheInfo):
-    # Constants shared by all lru cache instances:
-    sentinel = object()  # unique object used to signal cache misses
-    make_key = _make_key  # build a key from the function arguments
-    PREV, NEXT, KEY, RESULT = 0, 1, 2, 3  # names for the link fields
-
-    cache = {}
-    hits = misses = 0
-    full = False
-    cache_get = cache.get  # bound method to lookup a key or return None
-    cache_len = cache.__len__  # get cache size without calling len()
-    lock = RLock()  # because linkedlist updates aren't threadsafe
-    root = []  # root of the circular doubly linked list
-    root[:] = [root, root, None, None]  # initialize by pointing to self
-
-    if maxsize == 0:
-
-        def wrapper(*args, **kwds):
-            # No caching -- just a statistics update
-            nonlocal misses
-            misses += 1
-            result = user_function(*args, **kwds)
-            return result
-
-    elif maxsize is None:
-
-        def wrapper(*args, **kwds):
-            # Simple caching without ordering or size limit
-            nonlocal hits, misses
-            key = make_key(args, kwds, typed)
-            result = cache_get(key, sentinel)
-            if result is not sentinel:
-                hits += 1
-                return result
-            misses += 1
-            result = user_function(*args, **kwds)
-            cache[key] = result
-            return result
-
-    else:
-
-        def wrapper(*args, **kwds):
-            # Size limited caching that tracks accesses by recency
-            nonlocal root, hits, misses, full
-            key = make_key(args, kwds, typed)
-            with lock:
-                link = cache_get(key)
-                if link is not None:
-                    # Move the link to the front of the circular queue
-                    link_prev, link_next, _key, result = link
-                    link_prev[NEXT] = link_next
-                    link_next[PREV] = link_prev
-                    last = root[PREV]
-                    last[NEXT] = root[PREV] = link
-                    link[PREV] = last
-                    link[NEXT] = root
-                    hits += 1
-                    return result
-                misses += 1
-            result = user_function(*args, **kwds)
-            with lock:
-                if key in cache:
-                    # Getting here means that this same key was added to the
-                    # cache while the lock was released.  Since the link
-                    # update is already done, we need only return the
-                    # computed result and update the count of misses.
-                    pass
-                elif full:
-                    # Use the old root to store the new key and result.
-                    oldroot = root
-                    oldroot[KEY] = key
-                    oldroot[RESULT] = result
-                    # Empty the oldest link and make it the new root.
-                    # Keep a reference to the old key and old result to
-                    # prevent their ref counts from going to zero during the
-                    # update. That will prevent potentially arbitrary object
-                    # clean-up code (i.e. __del__) from running while we're
-                    # still adjusting the links.
-                    root = oldroot[NEXT]
-                    oldkey = root[KEY]
-                    root[KEY] = root[RESULT] = None
-                    # Now update the cache dictionary.
-                    del cache[oldkey]
-                    # Save the potentially reentrant cache[key] assignment
-                    # for last, after the root and links have been put in
-                    # a consistent state.
-                    cache[key] = oldroot
-                else:
-                    # Put result in a new link at the front of the queue.
-                    last = root[PREV]
-                    link = [last, root, key, result]
-                    last[NEXT] = root[PREV] = cache[key] = link
-                    # Use the cache_len bound method instead of the len() function
-                    # which could potentially be wrapped in an lru_cache itself.
-                    full = cache_len() >= maxsize
-            return result
-
-    def cache_info():
-        """Report cache statistics"""
-        with lock:
-            return _CacheInfo(hits, misses, maxsize, cache_len())
-
-    def cache_clear():
-        """Clear the cache and cache statistics"""
-        nonlocal hits, misses, full
-        with lock:
-            cache.clear()
-            root[:] = [root, root, None, None]
-            hits = misses = 0
-            full = False
-
-    wrapper.cache_info = cache_info
-    wrapper.cache_clear = cache_clear
-    return wrapper
diff --git a/lib/backports/tarfile/__init__.py b/lib/backports/tarfile/__init__.py
new file mode 100644
index 00000000..6dd498dc
--- /dev/null
+++ b/lib/backports/tarfile/__init__.py
@@ -0,0 +1,2902 @@
+#!/usr/bin/env python3
+#-------------------------------------------------------------------
+# tarfile.py
+#-------------------------------------------------------------------
+# Copyright (C) 2002 Lars Gustaebel <lars@gustaebel.de>
+# All rights reserved.
+#
+# Permission  is  hereby granted,  free  of charge,  to  any person
+# obtaining a  copy of  this software  and associated documentation
+# files  (the  "Software"),  to   deal  in  the  Software   without
+# restriction,  including  without limitation  the  rights to  use,
+# copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies  of  the  Software,  and to  permit  persons  to  whom the
+# Software  is  furnished  to  do  so,  subject  to  the  following
+# conditions:
+#
+# The above copyright  notice and this  permission notice shall  be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS  IS", WITHOUT WARRANTY OF ANY  KIND,
+# EXPRESS OR IMPLIED, INCLUDING  BUT NOT LIMITED TO  THE WARRANTIES
+# OF  MERCHANTABILITY,  FITNESS   FOR  A  PARTICULAR   PURPOSE  AND
+# NONINFRINGEMENT.  IN  NO  EVENT SHALL  THE  AUTHORS  OR COPYRIGHT
+# HOLDERS  BE LIABLE  FOR ANY  CLAIM, DAMAGES  OR OTHER  LIABILITY,
+# WHETHER  IN AN  ACTION OF  CONTRACT, TORT  OR OTHERWISE,  ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+# OTHER DEALINGS IN THE SOFTWARE.
+#
+"""Read from and write to tar format archives.
+"""
+
+version     = "0.9.0"
+__author__  = "Lars Gust\u00e4bel (lars@gustaebel.de)"
+__credits__ = "Gustavo Niemeyer, Niels Gust\u00e4bel, Richard Townsend."
+
+#---------
+# Imports
+#---------
+from builtins import open as bltn_open
+import sys
+import os
+import io
+import shutil
+import stat
+import time
+import struct
+import copy
+import re
+import warnings
+
+from .compat.py38 import removesuffix
+
+try:
+    import pwd
+except ImportError:
+    pwd = None
+try:
+    import grp
+except ImportError:
+    grp = None
+
+# os.symlink on Windows prior to 6.0 raises NotImplementedError
+# OSError (winerror=1314) will be raised if the caller does not hold the
+# SeCreateSymbolicLinkPrivilege privilege
+symlink_exception = (AttributeError, NotImplementedError, OSError)
+
+# from tarfile import *
+__all__ = ["TarFile", "TarInfo", "is_tarfile", "TarError", "ReadError",
+           "CompressionError", "StreamError", "ExtractError", "HeaderError",
+           "ENCODING", "USTAR_FORMAT", "GNU_FORMAT", "PAX_FORMAT",
+           "DEFAULT_FORMAT", "open","fully_trusted_filter", "data_filter",
+           "tar_filter", "FilterError", "AbsoluteLinkError",
+           "OutsideDestinationError", "SpecialFileError", "AbsolutePathError",
+           "LinkOutsideDestinationError"]
+
+
+#---------------------------------------------------------
+# tar constants
+#---------------------------------------------------------
+NUL = b"\0"                     # the null character
+BLOCKSIZE = 512                 # length of processing blocks
+RECORDSIZE = BLOCKSIZE * 20     # length of records
+GNU_MAGIC = b"ustar  \0"        # magic gnu tar string
+POSIX_MAGIC = b"ustar\x0000"    # magic posix tar string
+
+LENGTH_NAME = 100               # maximum length of a filename
+LENGTH_LINK = 100               # maximum length of a linkname
+LENGTH_PREFIX = 155             # maximum length of the prefix field
+
+REGTYPE = b"0"                  # regular file
+AREGTYPE = b"\0"                # regular file
+LNKTYPE = b"1"                  # link (inside tarfile)
+SYMTYPE = b"2"                  # symbolic link
+CHRTYPE = b"3"                  # character special device
+BLKTYPE = b"4"                  # block special device
+DIRTYPE = b"5"                  # directory
+FIFOTYPE = b"6"                 # fifo special device
+CONTTYPE = b"7"                 # contiguous file
+
+GNUTYPE_LONGNAME = b"L"         # GNU tar longname
+GNUTYPE_LONGLINK = b"K"         # GNU tar longlink
+GNUTYPE_SPARSE = b"S"           # GNU tar sparse file
+
+XHDTYPE = b"x"                  # POSIX.1-2001 extended header
+XGLTYPE = b"g"                  # POSIX.1-2001 global header
+SOLARIS_XHDTYPE = b"X"          # Solaris extended header
+
+USTAR_FORMAT = 0                # POSIX.1-1988 (ustar) format
+GNU_FORMAT = 1                  # GNU tar format
+PAX_FORMAT = 2                  # POSIX.1-2001 (pax) format
+DEFAULT_FORMAT = PAX_FORMAT
+
+#---------------------------------------------------------
+# tarfile constants
+#---------------------------------------------------------
+# File types that tarfile supports:
+SUPPORTED_TYPES = (REGTYPE, AREGTYPE, LNKTYPE,
+                   SYMTYPE, DIRTYPE, FIFOTYPE,
+                   CONTTYPE, CHRTYPE, BLKTYPE,
+                   GNUTYPE_LONGNAME, GNUTYPE_LONGLINK,
+                   GNUTYPE_SPARSE)
+
+# File types that will be treated as a regular file.
+REGULAR_TYPES = (REGTYPE, AREGTYPE,
+                 CONTTYPE, GNUTYPE_SPARSE)
+
+# File types that are part of the GNU tar format.
+GNU_TYPES = (GNUTYPE_LONGNAME, GNUTYPE_LONGLINK,
+             GNUTYPE_SPARSE)
+
+# Fields from a pax header that override a TarInfo attribute.
+PAX_FIELDS = ("path", "linkpath", "size", "mtime",
+              "uid", "gid", "uname", "gname")
+
+# Fields from a pax header that are affected by hdrcharset.
+PAX_NAME_FIELDS = {"path", "linkpath", "uname", "gname"}
+
+# Fields in a pax header that are numbers, all other fields
+# are treated as strings.
+PAX_NUMBER_FIELDS = {
+    "atime": float,
+    "ctime": float,
+    "mtime": float,
+    "uid": int,
+    "gid": int,
+    "size": int
+}
+
+#---------------------------------------------------------
+# initialization
+#---------------------------------------------------------
+if os.name == "nt":
+    ENCODING = "utf-8"
+else:
+    ENCODING = sys.getfilesystemencoding()
+
+#---------------------------------------------------------
+# Some useful functions
+#---------------------------------------------------------
+
+def stn(s, length, encoding, errors):
+    """Convert a string to a null-terminated bytes object.
+    """
+    if s is None:
+        raise ValueError("metadata cannot contain None")
+    s = s.encode(encoding, errors)
+    return s[:length] + (length - len(s)) * NUL
+
+def nts(s, encoding, errors):
+    """Convert a null-terminated bytes object to a string.
+    """
+    p = s.find(b"\0")
+    if p != -1:
+        s = s[:p]
+    return s.decode(encoding, errors)
+
+def nti(s):
+    """Convert a number field to a python number.
+    """
+    # There are two possible encodings for a number field, see
+    # itn() below.
+    if s[0] in (0o200, 0o377):
+        n = 0
+        for i in range(len(s) - 1):
+            n <<= 8
+            n += s[i + 1]
+        if s[0] == 0o377:
+            n = -(256 ** (len(s) - 1) - n)
+    else:
+        try:
+            s = nts(s, "ascii", "strict")
+            n = int(s.strip() or "0", 8)
+        except ValueError:
+            raise InvalidHeaderError("invalid header")
+    return n
+
+def itn(n, digits=8, format=DEFAULT_FORMAT):
+    """Convert a python number to a number field.
+    """
+    # POSIX 1003.1-1988 requires numbers to be encoded as a string of
+    # octal digits followed by a null-byte, this allows values up to
+    # (8**(digits-1))-1. GNU tar allows storing numbers greater than
+    # that if necessary. A leading 0o200 or 0o377 byte indicate this
+    # particular encoding, the following digits-1 bytes are a big-endian
+    # base-256 representation. This allows values up to (256**(digits-1))-1.
+    # A 0o200 byte indicates a positive number, a 0o377 byte a negative
+    # number.
+    original_n = n
+    n = int(n)
+    if 0 <= n < 8 ** (digits - 1):
+        s = bytes("%0*o" % (digits - 1, n), "ascii") + NUL
+    elif format == GNU_FORMAT and -256 ** (digits - 1) <= n < 256 ** (digits - 1):
+        if n >= 0:
+            s = bytearray([0o200])
+        else:
+            s = bytearray([0o377])
+            n = 256 ** digits + n
+
+        for i in range(digits - 1):
+            s.insert(1, n & 0o377)
+            n >>= 8
+    else:
+        raise ValueError("overflow in number field")
+
+    return s
+
+def calc_chksums(buf):
+    """Calculate the checksum for a member's header by summing up all
+       characters except for the chksum field which is treated as if
+       it was filled with spaces. According to the GNU tar sources,
+       some tars (Sun and NeXT) calculate chksum with signed char,
+       which will be different if there are chars in the buffer with
+       the high bit set. So we calculate two checksums, unsigned and
+       signed.
+    """
+    unsigned_chksum = 256 + sum(struct.unpack_from("148B8x356B", buf))
+    signed_chksum = 256 + sum(struct.unpack_from("148b8x356b", buf))
+    return unsigned_chksum, signed_chksum
+
+def copyfileobj(src, dst, length=None, exception=OSError, bufsize=None):
+    """Copy length bytes from fileobj src to fileobj dst.
+       If length is None, copy the entire content.
+    """
+    bufsize = bufsize or 16 * 1024
+    if length == 0:
+        return
+    if length is None:
+        shutil.copyfileobj(src, dst, bufsize)
+        return
+
+    blocks, remainder = divmod(length, bufsize)
+    for b in range(blocks):
+        buf = src.read(bufsize)
+        if len(buf) < bufsize:
+            raise exception("unexpected end of data")
+        dst.write(buf)
+
+    if remainder != 0:
+        buf = src.read(remainder)
+        if len(buf) < remainder:
+            raise exception("unexpected end of data")
+        dst.write(buf)
+    return
+
+def _safe_print(s):
+    encoding = getattr(sys.stdout, 'encoding', None)
+    if encoding is not None:
+        s = s.encode(encoding, 'backslashreplace').decode(encoding)
+    print(s, end=' ')
+
+
+class TarError(Exception):
+    """Base exception."""
+    pass
+class ExtractError(TarError):
+    """General exception for extract errors."""
+    pass
+class ReadError(TarError):
+    """Exception for unreadable tar archives."""
+    pass
+class CompressionError(TarError):
+    """Exception for unavailable compression methods."""
+    pass
+class StreamError(TarError):
+    """Exception for unsupported operations on stream-like TarFiles."""
+    pass
+class HeaderError(TarError):
+    """Base exception for header errors."""
+    pass
+class EmptyHeaderError(HeaderError):
+    """Exception for empty headers."""
+    pass
+class TruncatedHeaderError(HeaderError):
+    """Exception for truncated headers."""
+    pass
+class EOFHeaderError(HeaderError):
+    """Exception for end of file headers."""
+    pass
+class InvalidHeaderError(HeaderError):
+    """Exception for invalid headers."""
+    pass
+class SubsequentHeaderError(HeaderError):
+    """Exception for missing and invalid extended headers."""
+    pass
+
+#---------------------------
+# internal stream interface
+#---------------------------
+class _LowLevelFile:
+    """Low-level file object. Supports reading and writing.
+       It is used instead of a regular file object for streaming
+       access.
+    """
+
+    def __init__(self, name, mode):
+        mode = {
+            "r": os.O_RDONLY,
+            "w": os.O_WRONLY | os.O_CREAT | os.O_TRUNC,
+        }[mode]
+        if hasattr(os, "O_BINARY"):
+            mode |= os.O_BINARY
+        self.fd = os.open(name, mode, 0o666)
+
+    def close(self):
+        os.close(self.fd)
+
+    def read(self, size):
+        return os.read(self.fd, size)
+
+    def write(self, s):
+        os.write(self.fd, s)
+
+class _Stream:
+    """Class that serves as an adapter between TarFile and
+       a stream-like object.  The stream-like object only
+       needs to have a read() or write() method that works with bytes,
+       and the method is accessed blockwise.
+       Use of gzip or bzip2 compression is possible.
+       A stream-like object could be for example: sys.stdin.buffer,
+       sys.stdout.buffer, a socket, a tape device etc.
+
+       _Stream is intended to be used only internally.
+    """
+
+    def __init__(self, name, mode, comptype, fileobj, bufsize,
+                 compresslevel):
+        """Construct a _Stream object.
+        """
+        self._extfileobj = True
+        if fileobj is None:
+            fileobj = _LowLevelFile(name, mode)
+            self._extfileobj = False
+
+        if comptype == '*':
+            # Enable transparent compression detection for the
+            # stream interface
+            fileobj = _StreamProxy(fileobj)
+            comptype = fileobj.getcomptype()
+
+        self.name     = name or ""
+        self.mode     = mode
+        self.comptype = comptype
+        self.fileobj  = fileobj
+        self.bufsize  = bufsize
+        self.buf      = b""
+        self.pos      = 0
+        self.closed   = False
+
+        try:
+            if comptype == "gz":
+                try:
+                    import zlib
+                except ImportError:
+                    raise CompressionError("zlib module is not available") from None
+                self.zlib = zlib
+                self.crc = zlib.crc32(b"")
+                if mode == "r":
+                    self.exception = zlib.error
+                    self._init_read_gz()
+                else:
+                    self._init_write_gz(compresslevel)
+
+            elif comptype == "bz2":
+                try:
+                    import bz2
+                except ImportError:
+                    raise CompressionError("bz2 module is not available") from None
+                if mode == "r":
+                    self.dbuf = b""
+                    self.cmp = bz2.BZ2Decompressor()
+                    self.exception = OSError
+                else:
+                    self.cmp = bz2.BZ2Compressor(compresslevel)
+
+            elif comptype == "xz":
+                try:
+                    import lzma
+                except ImportError:
+                    raise CompressionError("lzma module is not available") from None
+                if mode == "r":
+                    self.dbuf = b""
+                    self.cmp = lzma.LZMADecompressor()
+                    self.exception = lzma.LZMAError
+                else:
+                    self.cmp = lzma.LZMACompressor()
+
+            elif comptype != "tar":
+                raise CompressionError("unknown compression type %r" % comptype)
+
+        except:
+            if not self._extfileobj:
+                self.fileobj.close()
+            self.closed = True
+            raise
+
+    def __del__(self):
+        if hasattr(self, "closed") and not self.closed:
+            self.close()
+
+    def _init_write_gz(self, compresslevel):
+        """Initialize for writing with gzip compression.
+        """
+        self.cmp = self.zlib.compressobj(compresslevel,
+                                         self.zlib.DEFLATED,
+                                         -self.zlib.MAX_WBITS,
+                                         self.zlib.DEF_MEM_LEVEL,
+                                         0)
+        timestamp = struct.pack("<L", int(time.time()))
+        self.__write(b"\037\213\010\010" + timestamp + b"\002\377")
+        if self.name.endswith(".gz"):
+            self.name = self.name[:-3]
+        # Honor "directory components removed" from RFC1952
+        self.name = os.path.basename(self.name)
+        # RFC1952 says we must use ISO-8859-1 for the FNAME field.
+        self.__write(self.name.encode("iso-8859-1", "replace") + NUL)
+
+    def write(self, s):
+        """Write string s to the stream.
+        """
+        if self.comptype == "gz":
+            self.crc = self.zlib.crc32(s, self.crc)
+        self.pos += len(s)
+        if self.comptype != "tar":
+            s = self.cmp.compress(s)
+        self.__write(s)
+
+    def __write(self, s):
+        """Write string s to the stream if a whole new block
+           is ready to be written.
+        """
+        self.buf += s
+        while len(self.buf) > self.bufsize:
+            self.fileobj.write(self.buf[:self.bufsize])
+            self.buf = self.buf[self.bufsize:]
+
+    def close(self):
+        """Close the _Stream object. No operation should be
+           done on it afterwards.
+        """
+        if self.closed:
+            return
+
+        self.closed = True
+        try:
+            if self.mode == "w" and self.comptype != "tar":
+                self.buf += self.cmp.flush()
+
+            if self.mode == "w" and self.buf:
+                self.fileobj.write(self.buf)
+                self.buf = b""
+                if self.comptype == "gz":
+                    self.fileobj.write(struct.pack("<L", self.crc))
+                    self.fileobj.write(struct.pack("<L", self.pos & 0xffffFFFF))
+        finally:
+            if not self._extfileobj:
+                self.fileobj.close()
+
+    def _init_read_gz(self):
+        """Initialize for reading a gzip compressed fileobj.
+        """
+        self.cmp = self.zlib.decompressobj(-self.zlib.MAX_WBITS)
+        self.dbuf = b""
+
+        # taken from gzip.GzipFile with some alterations
+        if self.__read(2) != b"\037\213":
+            raise ReadError("not a gzip file")
+        if self.__read(1) != b"\010":
+            raise CompressionError("unsupported compression method")
+
+        flag = ord(self.__read(1))
+        self.__read(6)
+
+        if flag & 4:
+            xlen = ord(self.__read(1)) + 256 * ord(self.__read(1))
+            self.read(xlen)
+        if flag & 8:
+            while True:
+                s = self.__read(1)
+                if not s or s == NUL:
+                    break
+        if flag & 16:
+            while True:
+                s = self.__read(1)
+                if not s or s == NUL:
+                    break
+        if flag & 2:
+            self.__read(2)
+
+    def tell(self):
+        """Return the stream's file pointer position.
+        """
+        return self.pos
+
+    def seek(self, pos=0):
+        """Set the stream's file pointer to pos. Negative seeking
+           is forbidden.
+        """
+        if pos - self.pos >= 0:
+            blocks, remainder = divmod(pos - self.pos, self.bufsize)
+            for i in range(blocks):
+                self.read(self.bufsize)
+            self.read(remainder)
+        else:
+            raise StreamError("seeking backwards is not allowed")
+        return self.pos
+
+    def read(self, size):
+        """Return the next size number of bytes from the stream."""
+        assert size is not None
+        buf = self._read(size)
+        self.pos += len(buf)
+        return buf
+
+    def _read(self, size):
+        """Return size bytes from the stream.
+        """
+        if self.comptype == "tar":
+            return self.__read(size)
+
+        c = len(self.dbuf)
+        t = [self.dbuf]
+        while c < size:
+            # Skip underlying buffer to avoid unaligned double buffering.
+            if self.buf:
+                buf = self.buf
+                self.buf = b""
+            else:
+                buf = self.fileobj.read(self.bufsize)
+                if not buf:
+                    break
+            try:
+                buf = self.cmp.decompress(buf)
+            except self.exception as e:
+                raise ReadError("invalid compressed data") from e
+            t.append(buf)
+            c += len(buf)
+        t = b"".join(t)
+        self.dbuf = t[size:]
+        return t[:size]
+
+    def __read(self, size):
+        """Return size bytes from stream. If internal buffer is empty,
+           read another block from the stream.
+        """
+        c = len(self.buf)
+        t = [self.buf]
+        while c < size:
+            buf = self.fileobj.read(self.bufsize)
+            if not buf:
+                break
+            t.append(buf)
+            c += len(buf)
+        t = b"".join(t)
+        self.buf = t[size:]
+        return t[:size]
+# class _Stream
+
+class _StreamProxy(object):
+    """Small proxy class that enables transparent compression
+       detection for the Stream interface (mode 'r|*').
+    """
+
+    def __init__(self, fileobj):
+        self.fileobj = fileobj
+        self.buf = self.fileobj.read(BLOCKSIZE)
+
+    def read(self, size):
+        self.read = self.fileobj.read
+        return self.buf
+
+    def getcomptype(self):
+        if self.buf.startswith(b"\x1f\x8b\x08"):
+            return "gz"
+        elif self.buf[0:3] == b"BZh" and self.buf[4:10] == b"1AY&SY":
+            return "bz2"
+        elif self.buf.startswith((b"\x5d\x00\x00\x80", b"\xfd7zXZ")):
+            return "xz"
+        else:
+            return "tar"
+
+    def close(self):
+        self.fileobj.close()
+# class StreamProxy
+
+#------------------------
+# Extraction file object
+#------------------------
+class _FileInFile(object):
+    """A thin wrapper around an existing file object that
+       provides a part of its data as an individual file
+       object.
+    """
+
+    def __init__(self, fileobj, offset, size, name, blockinfo=None):
+        self.fileobj = fileobj
+        self.offset = offset
+        self.size = size
+        self.position = 0
+        self.name = name
+        self.closed = False
+
+        if blockinfo is None:
+            blockinfo = [(0, size)]
+
+        # Construct a map with data and zero blocks.
+        self.map_index = 0
+        self.map = []
+        lastpos = 0
+        realpos = self.offset
+        for offset, size in blockinfo:
+            if offset > lastpos:
+                self.map.append((False, lastpos, offset, None))
+            self.map.append((True, offset, offset + size, realpos))
+            realpos += size
+            lastpos = offset + size
+        if lastpos < self.size:
+            self.map.append((False, lastpos, self.size, None))
+
+    def flush(self):
+        pass
+
+    def readable(self):
+        return True
+
+    def writable(self):
+        return False
+
+    def seekable(self):
+        return self.fileobj.seekable()
+
+    def tell(self):
+        """Return the current file position.
+        """
+        return self.position
+
+    def seek(self, position, whence=io.SEEK_SET):
+        """Seek to a position in the file.
+        """
+        if whence == io.SEEK_SET:
+            self.position = min(max(position, 0), self.size)
+        elif whence == io.SEEK_CUR:
+            if position < 0:
+                self.position = max(self.position + position, 0)
+            else:
+                self.position = min(self.position + position, self.size)
+        elif whence == io.SEEK_END:
+            self.position = max(min(self.size + position, self.size), 0)
+        else:
+            raise ValueError("Invalid argument")
+        return self.position
+
+    def read(self, size=None):
+        """Read data from the file.
+        """
+        if size is None:
+            size = self.size - self.position
+        else:
+            size = min(size, self.size - self.position)
+
+        buf = b""
+        while size > 0:
+            while True:
+                data, start, stop, offset = self.map[self.map_index]
+                if start <= self.position < stop:
+                    break
+                else:
+                    self.map_index += 1
+                    if self.map_index == len(self.map):
+                        self.map_index = 0
+            length = min(size, stop - self.position)
+            if data:
+                self.fileobj.seek(offset + (self.position - start))
+                b = self.fileobj.read(length)
+                if len(b) != length:
+                    raise ReadError("unexpected end of data")
+                buf += b
+            else:
+                buf += NUL * length
+            size -= length
+            self.position += length
+        return buf
+
+    def readinto(self, b):
+        buf = self.read(len(b))
+        b[:len(buf)] = buf
+        return len(buf)
+
+    def close(self):
+        self.closed = True
+#class _FileInFile
+
+class ExFileObject(io.BufferedReader):
+
+    def __init__(self, tarfile, tarinfo):
+        fileobj = _FileInFile(tarfile.fileobj, tarinfo.offset_data,
+                tarinfo.size, tarinfo.name, tarinfo.sparse)
+        super().__init__(fileobj)
+#class ExFileObject
+
+
+#-----------------------------
+# extraction filters (PEP 706)
+#-----------------------------
+
+class FilterError(TarError):
+    pass
+
+class AbsolutePathError(FilterError):
+    def __init__(self, tarinfo):
+        self.tarinfo = tarinfo
+        super().__init__(f'member {tarinfo.name!r} has an absolute path')
+
+class OutsideDestinationError(FilterError):
+    def __init__(self, tarinfo, path):
+        self.tarinfo = tarinfo
+        self._path = path
+        super().__init__(f'{tarinfo.name!r} would be extracted to {path!r}, '
+                         + 'which is outside the destination')
+
+class SpecialFileError(FilterError):
+    def __init__(self, tarinfo):
+        self.tarinfo = tarinfo
+        super().__init__(f'{tarinfo.name!r} is a special file')
+
+class AbsoluteLinkError(FilterError):
+    def __init__(self, tarinfo):
+        self.tarinfo = tarinfo
+        super().__init__(f'{tarinfo.name!r} is a link to an absolute path')
+
+class LinkOutsideDestinationError(FilterError):
+    def __init__(self, tarinfo, path):
+        self.tarinfo = tarinfo
+        self._path = path
+        super().__init__(f'{tarinfo.name!r} would link to {path!r}, '
+                         + 'which is outside the destination')
+
+def _get_filtered_attrs(member, dest_path, for_data=True):
+    new_attrs = {}
+    name = member.name
+    dest_path = os.path.realpath(dest_path)
+    # Strip leading / (tar's directory separator) from filenames.
+    # Include os.sep (target OS directory separator) as well.
+    if name.startswith(('/', os.sep)):
+        name = new_attrs['name'] = member.path.lstrip('/' + os.sep)
+    if os.path.isabs(name):
+        # Path is absolute even after stripping.
+        # For example, 'C:/foo' on Windows.
+        raise AbsolutePathError(member)
+    # Ensure we stay in the destination
+    target_path = os.path.realpath(os.path.join(dest_path, name))
+    if os.path.commonpath([target_path, dest_path]) != dest_path:
+        raise OutsideDestinationError(member, target_path)
+    # Limit permissions (no high bits, and go-w)
+    mode = member.mode
+    if mode is not None:
+        # Strip high bits & group/other write bits
+        mode = mode & 0o755
+        if for_data:
+            # For data, handle permissions & file types
+            if member.isreg() or member.islnk():
+                if not mode & 0o100:
+                    # Clear executable bits if not executable by user
+                    mode &= ~0o111
+                # Ensure owner can read & write
+                mode |= 0o600
+            elif member.isdir() or member.issym():
+                # Ignore mode for directories & symlinks
+                mode = None
+            else:
+                # Reject special files
+                raise SpecialFileError(member)
+        if mode != member.mode:
+            new_attrs['mode'] = mode
+    if for_data:
+        # Ignore ownership for 'data'
+        if member.uid is not None:
+            new_attrs['uid'] = None
+        if member.gid is not None:
+            new_attrs['gid'] = None
+        if member.uname is not None:
+            new_attrs['uname'] = None
+        if member.gname is not None:
+            new_attrs['gname'] = None
+        # Check link destination for 'data'
+        if member.islnk() or member.issym():
+            if os.path.isabs(member.linkname):
+                raise AbsoluteLinkError(member)
+            if member.issym():
+                target_path = os.path.join(dest_path,
+                                           os.path.dirname(name),
+                                           member.linkname)
+            else:
+                target_path = os.path.join(dest_path,
+                                           member.linkname)
+            target_path = os.path.realpath(target_path)
+            if os.path.commonpath([target_path, dest_path]) != dest_path:
+                raise LinkOutsideDestinationError(member, target_path)
+    return new_attrs
+
+def fully_trusted_filter(member, dest_path):
+    return member
+
+def tar_filter(member, dest_path):
+    new_attrs = _get_filtered_attrs(member, dest_path, False)
+    if new_attrs:
+        return member.replace(**new_attrs, deep=False)
+    return member
+
+def data_filter(member, dest_path):
+    new_attrs = _get_filtered_attrs(member, dest_path, True)
+    if new_attrs:
+        return member.replace(**new_attrs, deep=False)
+    return member
+
+_NAMED_FILTERS = {
+    "fully_trusted": fully_trusted_filter,
+    "tar": tar_filter,
+    "data": data_filter,
+}
+
+#------------------
+# Exported Classes
+#------------------
+
+# Sentinel for replace() defaults, meaning "don't change the attribute"
+_KEEP = object()
+
+class TarInfo(object):
+    """Informational class which holds the details about an
+       archive member given by a tar header block.
+       TarInfo objects are returned by TarFile.getmember(),
+       TarFile.getmembers() and TarFile.gettarinfo() and are
+       usually created internally.
+    """
+
+    __slots__ = dict(
+        name = 'Name of the archive member.',
+        mode = 'Permission bits.',
+        uid = 'User ID of the user who originally stored this member.',
+        gid = 'Group ID of the user who originally stored this member.',
+        size = 'Size in bytes.',
+        mtime = 'Time of last modification.',
+        chksum = 'Header checksum.',
+        type = ('File type. type is usually one of these constants: '
+                'REGTYPE, AREGTYPE, LNKTYPE, SYMTYPE, DIRTYPE, FIFOTYPE, '
+                'CONTTYPE, CHRTYPE, BLKTYPE, GNUTYPE_SPARSE.'),
+        linkname = ('Name of the target file name, which is only present '
+                    'in TarInfo objects of type LNKTYPE and SYMTYPE.'),
+        uname = 'User name.',
+        gname = 'Group name.',
+        devmajor = 'Device major number.',
+        devminor = 'Device minor number.',
+        offset = 'The tar header starts here.',
+        offset_data = "The file's data starts here.",
+        pax_headers = ('A dictionary containing key-value pairs of an '
+                       'associated pax extended header.'),
+        sparse = 'Sparse member information.',
+        tarfile = None,
+        _sparse_structs = None,
+        _link_target = None,
+        )
+
+    def __init__(self, name=""):
+        """Construct a TarInfo object. name is the optional name
+           of the member.
+        """
+        self.name = name        # member name
+        self.mode = 0o644       # file permissions
+        self.uid = 0            # user id
+        self.gid = 0            # group id
+        self.size = 0           # file size
+        self.mtime = 0          # modification time
+        self.chksum = 0         # header checksum
+        self.type = REGTYPE     # member type
+        self.linkname = ""      # link name
+        self.uname = ""         # user name
+        self.gname = ""         # group name
+        self.devmajor = 0       # device major number
+        self.devminor = 0       # device minor number
+
+        self.offset = 0         # the tar header starts here
+        self.offset_data = 0    # the file's data starts here
+
+        self.sparse = None      # sparse member information
+        self.pax_headers = {}   # pax header information
+
+    @property
+    def path(self):
+        'In pax headers, "name" is called "path".'
+        return self.name
+
+    @path.setter
+    def path(self, name):
+        self.name = name
+
+    @property
+    def linkpath(self):
+        'In pax headers, "linkname" is called "linkpath".'
+        return self.linkname
+
+    @linkpath.setter
+    def linkpath(self, linkname):
+        self.linkname = linkname
+
+    def __repr__(self):
+        return "<%s %r at %#x>" % (self.__class__.__name__,self.name,id(self))
+
+    def replace(self, *,
+                name=_KEEP, mtime=_KEEP, mode=_KEEP, linkname=_KEEP,
+                uid=_KEEP, gid=_KEEP, uname=_KEEP, gname=_KEEP,
+                deep=True, _KEEP=_KEEP):
+        """Return a deep copy of self with the given attributes replaced.
+        """
+        if deep:
+            result = copy.deepcopy(self)
+        else:
+            result = copy.copy(self)
+        if name is not _KEEP:
+            result.name = name
+        if mtime is not _KEEP:
+            result.mtime = mtime
+        if mode is not _KEEP:
+            result.mode = mode
+        if linkname is not _KEEP:
+            result.linkname = linkname
+        if uid is not _KEEP:
+            result.uid = uid
+        if gid is not _KEEP:
+            result.gid = gid
+        if uname is not _KEEP:
+            result.uname = uname
+        if gname is not _KEEP:
+            result.gname = gname
+        return result
+
+    def get_info(self):
+        """Return the TarInfo's attributes as a dictionary.
+        """
+        if self.mode is None:
+            mode = None
+        else:
+            mode = self.mode & 0o7777
+        info = {
+            "name":     self.name,
+            "mode":     mode,
+            "uid":      self.uid,
+            "gid":      self.gid,
+            "size":     self.size,
+            "mtime":    self.mtime,
+            "chksum":   self.chksum,
+            "type":     self.type,
+            "linkname": self.linkname,
+            "uname":    self.uname,
+            "gname":    self.gname,
+            "devmajor": self.devmajor,
+            "devminor": self.devminor
+        }
+
+        if info["type"] == DIRTYPE and not info["name"].endswith("/"):
+            info["name"] += "/"
+
+        return info
+
+    def tobuf(self, format=DEFAULT_FORMAT, encoding=ENCODING, errors="surrogateescape"):
+        """Return a tar header as a string of 512 byte blocks.
+        """
+        info = self.get_info()
+        for name, value in info.items():
+            if value is None:
+                raise ValueError("%s may not be None" % name)
+
+        if format == USTAR_FORMAT:
+            return self.create_ustar_header(info, encoding, errors)
+        elif format == GNU_FORMAT:
+            return self.create_gnu_header(info, encoding, errors)
+        elif format == PAX_FORMAT:
+            return self.create_pax_header(info, encoding)
+        else:
+            raise ValueError("invalid format")
+
+    def create_ustar_header(self, info, encoding, errors):
+        """Return the object as a ustar header block.
+        """
+        info["magic"] = POSIX_MAGIC
+
+        if len(info["linkname"].encode(encoding, errors)) > LENGTH_LINK:
+            raise ValueError("linkname is too long")
+
+        if len(info["name"].encode(encoding, errors)) > LENGTH_NAME:
+            info["prefix"], info["name"] = self._posix_split_name(info["name"], encoding, errors)
+
+        return self._create_header(info, USTAR_FORMAT, encoding, errors)
+
+    def create_gnu_header(self, info, encoding, errors):
+        """Return the object as a GNU header block sequence.
+        """
+        info["magic"] = GNU_MAGIC
+
+        buf = b""
+        if len(info["linkname"].encode(encoding, errors)) > LENGTH_LINK:
+            buf += self._create_gnu_long_header(info["linkname"], GNUTYPE_LONGLINK, encoding, errors)
+
+        if len(info["name"].encode(encoding, errors)) > LENGTH_NAME:
+            buf += self._create_gnu_long_header(info["name"], GNUTYPE_LONGNAME, encoding, errors)
+
+        return buf + self._create_header(info, GNU_FORMAT, encoding, errors)
+
+    def create_pax_header(self, info, encoding):
+        """Return the object as a ustar header block. If it cannot be
+           represented this way, prepend a pax extended header sequence
+           with supplement information.
+        """
+        info["magic"] = POSIX_MAGIC
+        pax_headers = self.pax_headers.copy()
+
+        # Test string fields for values that exceed the field length or cannot
+        # be represented in ASCII encoding.
+        for name, hname, length in (
+                ("name", "path", LENGTH_NAME), ("linkname", "linkpath", LENGTH_LINK),
+                ("uname", "uname", 32), ("gname", "gname", 32)):
+
+            if hname in pax_headers:
+                # The pax header has priority.
+                continue
+
+            # Try to encode the string as ASCII.
+            try:
+                info[name].encode("ascii", "strict")
+            except UnicodeEncodeError:
+                pax_headers[hname] = info[name]
+                continue
+
+            if len(info[name]) > length:
+                pax_headers[hname] = info[name]
+
+        # Test number fields for values that exceed the field limit or values
+        # that like to be stored as float.
+        for name, digits in (("uid", 8), ("gid", 8), ("size", 12), ("mtime", 12)):
+            needs_pax = False
+
+            val = info[name]
+            val_is_float = isinstance(val, float)
+            val_int = round(val) if val_is_float else val
+            if not 0 <= val_int < 8 ** (digits - 1):
+                # Avoid overflow.
+                info[name] = 0
+                needs_pax = True
+            elif val_is_float:
+                # Put rounded value in ustar header, and full
+                # precision value in pax header.
+                info[name] = val_int
+                needs_pax = True
+
+            # The existing pax header has priority.
+            if needs_pax and name not in pax_headers:
+                pax_headers[name] = str(val)
+
+        # Create a pax extended header if necessary.
+        if pax_headers:
+            buf = self._create_pax_generic_header(pax_headers, XHDTYPE, encoding)
+        else:
+            buf = b""
+
+        return buf + self._create_header(info, USTAR_FORMAT, "ascii", "replace")
+
+    @classmethod
+    def create_pax_global_header(cls, pax_headers):
+        """Return the object as a pax global header block sequence.
+        """
+        return cls._create_pax_generic_header(pax_headers, XGLTYPE, "utf-8")
+
+    def _posix_split_name(self, name, encoding, errors):
+        """Split a name longer than 100 chars into a prefix
+           and a name part.
+        """
+        components = name.split("/")
+        for i in range(1, len(components)):
+            prefix = "/".join(components[:i])
+            name = "/".join(components[i:])
+            if len(prefix.encode(encoding, errors)) <= LENGTH_PREFIX and \
+                    len(name.encode(encoding, errors)) <= LENGTH_NAME:
+                break
+        else:
+            raise ValueError("name is too long")
+
+        return prefix, name
+
+    @staticmethod
+    def _create_header(info, format, encoding, errors):
+        """Return a header block. info is a dictionary with file
+           information, format must be one of the *_FORMAT constants.
+        """
+        has_device_fields = info.get("type") in (CHRTYPE, BLKTYPE)
+        if has_device_fields:
+            devmajor = itn(info.get("devmajor", 0), 8, format)
+            devminor = itn(info.get("devminor", 0), 8, format)
+        else:
+            devmajor = stn("", 8, encoding, errors)
+            devminor = stn("", 8, encoding, errors)
+
+        # None values in metadata should cause ValueError.
+        # itn()/stn() do this for all fields except type.
+        filetype = info.get("type", REGTYPE)
+        if filetype is None:
+            raise ValueError("TarInfo.type must not be None")
+
+        parts = [
+            stn(info.get("name", ""), 100, encoding, errors),
+            itn(info.get("mode", 0) & 0o7777, 8, format),
+            itn(info.get("uid", 0), 8, format),
+            itn(info.get("gid", 0), 8, format),
+            itn(info.get("size", 0), 12, format),
+            itn(info.get("mtime", 0), 12, format),
+            b"        ", # checksum field
+            filetype,
+            stn(info.get("linkname", ""), 100, encoding, errors),
+            info.get("magic", POSIX_MAGIC),
+            stn(info.get("uname", ""), 32, encoding, errors),
+            stn(info.get("gname", ""), 32, encoding, errors),
+            devmajor,
+            devminor,
+            stn(info.get("prefix", ""), 155, encoding, errors)
+        ]
+
+        buf = struct.pack("%ds" % BLOCKSIZE, b"".join(parts))
+        chksum = calc_chksums(buf[-BLOCKSIZE:])[0]
+        buf = buf[:-364] + bytes("%06o\0" % chksum, "ascii") + buf[-357:]
+        return buf
+
+    @staticmethod
+    def _create_payload(payload):
+        """Return the string payload filled with zero bytes
+           up to the next 512 byte border.
+        """
+        blocks, remainder = divmod(len(payload), BLOCKSIZE)
+        if remainder > 0:
+            payload += (BLOCKSIZE - remainder) * NUL
+        return payload
+
+    @classmethod
+    def _create_gnu_long_header(cls, name, type, encoding, errors):
+        """Return a GNUTYPE_LONGNAME or GNUTYPE_LONGLINK sequence
+           for name.
+        """
+        name = name.encode(encoding, errors) + NUL
+
+        info = {}
+        info["name"] = "././@LongLink"
+        info["type"] = type
+        info["size"] = len(name)
+        info["magic"] = GNU_MAGIC
+
+        # create extended header + name blocks.
+        return cls._create_header(info, USTAR_FORMAT, encoding, errors) + \
+                cls._create_payload(name)
+
+    @classmethod
+    def _create_pax_generic_header(cls, pax_headers, type, encoding):
+        """Return a POSIX.1-2008 extended or global header sequence
+           that contains a list of keyword, value pairs. The values
+           must be strings.
+        """
+        # Check if one of the fields contains surrogate characters and thereby
+        # forces hdrcharset=BINARY, see _proc_pax() for more information.
+        binary = False
+        for keyword, value in pax_headers.items():
+            try:
+                value.encode("utf-8", "strict")
+            except UnicodeEncodeError:
+                binary = True
+                break
+
+        records = b""
+        if binary:
+            # Put the hdrcharset field at the beginning of the header.
+            records += b"21 hdrcharset=BINARY\n"
+
+        for keyword, value in pax_headers.items():
+            keyword = keyword.encode("utf-8")
+            if binary:
+                # Try to restore the original byte representation of `value'.
+                # Needless to say, that the encoding must match the string.
+                value = value.encode(encoding, "surrogateescape")
+            else:
+                value = value.encode("utf-8")
+
+            l = len(keyword) + len(value) + 3   # ' ' + '=' + '\n'
+            n = p = 0
+            while True:
+                n = l + len(str(p))
+                if n == p:
+                    break
+                p = n
+            records += bytes(str(p), "ascii") + b" " + keyword + b"=" + value + b"\n"
+
+        # We use a hardcoded "././@PaxHeader" name like star does
+        # instead of the one that POSIX recommends.
+        info = {}
+        info["name"] = "././@PaxHeader"
+        info["type"] = type
+        info["size"] = len(records)
+        info["magic"] = POSIX_MAGIC
+
+        # Create pax header + record blocks.
+        return cls._create_header(info, USTAR_FORMAT, "ascii", "replace") + \
+                cls._create_payload(records)
+
+    @classmethod
+    def frombuf(cls, buf, encoding, errors):
+        """Construct a TarInfo object from a 512 byte bytes object.
+        """
+        if len(buf) == 0:
+            raise EmptyHeaderError("empty header")
+        if len(buf) != BLOCKSIZE:
+            raise TruncatedHeaderError("truncated header")
+        if buf.count(NUL) == BLOCKSIZE:
+            raise EOFHeaderError("end of file header")
+
+        chksum = nti(buf[148:156])
+        if chksum not in calc_chksums(buf):
+            raise InvalidHeaderError("bad checksum")
+
+        obj = cls()
+        obj.name = nts(buf[0:100], encoding, errors)
+        obj.mode = nti(buf[100:108])
+        obj.uid = nti(buf[108:116])
+        obj.gid = nti(buf[116:124])
+        obj.size = nti(buf[124:136])
+        obj.mtime = nti(buf[136:148])
+        obj.chksum = chksum
+        obj.type = buf[156:157]
+        obj.linkname = nts(buf[157:257], encoding, errors)
+        obj.uname = nts(buf[265:297], encoding, errors)
+        obj.gname = nts(buf[297:329], encoding, errors)
+        obj.devmajor = nti(buf[329:337])
+        obj.devminor = nti(buf[337:345])
+        prefix = nts(buf[345:500], encoding, errors)
+
+        # Old V7 tar format represents a directory as a regular
+        # file with a trailing slash.
+        if obj.type == AREGTYPE and obj.name.endswith("/"):
+            obj.type = DIRTYPE
+
+        # The old GNU sparse format occupies some of the unused
+        # space in the buffer for up to 4 sparse structures.
+        # Save them for later processing in _proc_sparse().
+        if obj.type == GNUTYPE_SPARSE:
+            pos = 386
+            structs = []
+            for i in range(4):
+                try:
+                    offset = nti(buf[pos:pos + 12])
+                    numbytes = nti(buf[pos + 12:pos + 24])
+                except ValueError:
+                    break
+                structs.append((offset, numbytes))
+                pos += 24
+            isextended = bool(buf[482])
+            origsize = nti(buf[483:495])
+            obj._sparse_structs = (structs, isextended, origsize)
+
+        # Remove redundant slashes from directories.
+        if obj.isdir():
+            obj.name = obj.name.rstrip("/")
+
+        # Reconstruct a ustar longname.
+        if prefix and obj.type not in GNU_TYPES:
+            obj.name = prefix + "/" + obj.name
+        return obj
+
+    @classmethod
+    def fromtarfile(cls, tarfile):
+        """Return the next TarInfo object from TarFile object
+           tarfile.
+        """
+        buf = tarfile.fileobj.read(BLOCKSIZE)
+        obj = cls.frombuf(buf, tarfile.encoding, tarfile.errors)
+        obj.offset = tarfile.fileobj.tell() - BLOCKSIZE
+        return obj._proc_member(tarfile)
+
+    #--------------------------------------------------------------------------
+    # The following are methods that are called depending on the type of a
+    # member. The entry point is _proc_member() which can be overridden in a
+    # subclass to add custom _proc_*() methods. A _proc_*() method MUST
+    # implement the following
+    # operations:
+    # 1. Set self.offset_data to the position where the data blocks begin,
+    #    if there is data that follows.
+    # 2. Set tarfile.offset to the position where the next member's header will
+    #    begin.
+    # 3. Return self or another valid TarInfo object.
+    def _proc_member(self, tarfile):
+        """Choose the right processing method depending on
+           the type and call it.
+        """
+        if self.type in (GNUTYPE_LONGNAME, GNUTYPE_LONGLINK):
+            return self._proc_gnulong(tarfile)
+        elif self.type == GNUTYPE_SPARSE:
+            return self._proc_sparse(tarfile)
+        elif self.type in (XHDTYPE, XGLTYPE, SOLARIS_XHDTYPE):
+            return self._proc_pax(tarfile)
+        else:
+            return self._proc_builtin(tarfile)
+
+    def _proc_builtin(self, tarfile):
+        """Process a builtin type or an unknown type which
+           will be treated as a regular file.
+        """
+        self.offset_data = tarfile.fileobj.tell()
+        offset = self.offset_data
+        if self.isreg() or self.type not in SUPPORTED_TYPES:
+            # Skip the following data blocks.
+            offset += self._block(self.size)
+        tarfile.offset = offset
+
+        # Patch the TarInfo object with saved global
+        # header information.
+        self._apply_pax_info(tarfile.pax_headers, tarfile.encoding, tarfile.errors)
+
+        # Remove redundant slashes from directories. This is to be consistent
+        # with frombuf().
+        if self.isdir():
+            self.name = self.name.rstrip("/")
+
+        return self
+
+    def _proc_gnulong(self, tarfile):
+        """Process the blocks that hold a GNU longname
+           or longlink member.
+        """
+        buf = tarfile.fileobj.read(self._block(self.size))
+
+        # Fetch the next header and process it.
+        try:
+            next = self.fromtarfile(tarfile)
+        except HeaderError as e:
+            raise SubsequentHeaderError(str(e)) from None
+
+        # Patch the TarInfo object from the next header with
+        # the longname information.
+        next.offset = self.offset
+        if self.type == GNUTYPE_LONGNAME:
+            next.name = nts(buf, tarfile.encoding, tarfile.errors)
+        elif self.type == GNUTYPE_LONGLINK:
+            next.linkname = nts(buf, tarfile.encoding, tarfile.errors)
+
+        # Remove redundant slashes from directories. This is to be consistent
+        # with frombuf().
+        if next.isdir():
+            next.name = removesuffix(next.name, "/")
+
+        return next
+
+    def _proc_sparse(self, tarfile):
+        """Process a GNU sparse header plus extra headers.
+        """
+        # We already collected some sparse structures in frombuf().
+        structs, isextended, origsize = self._sparse_structs
+        del self._sparse_structs
+
+        # Collect sparse structures from extended header blocks.
+        while isextended:
+            buf = tarfile.fileobj.read(BLOCKSIZE)
+            pos = 0
+            for i in range(21):
+                try:
+                    offset = nti(buf[pos:pos + 12])
+                    numbytes = nti(buf[pos + 12:pos + 24])
+                except ValueError:
+                    break
+                if offset and numbytes:
+                    structs.append((offset, numbytes))
+                pos += 24
+            isextended = bool(buf[504])
+        self.sparse = structs
+
+        self.offset_data = tarfile.fileobj.tell()
+        tarfile.offset = self.offset_data + self._block(self.size)
+        self.size = origsize
+        return self
+
+    def _proc_pax(self, tarfile):
+        """Process an extended or global header as described in
+           POSIX.1-2008.
+        """
+        # Read the header information.
+        buf = tarfile.fileobj.read(self._block(self.size))
+
+        # A pax header stores supplemental information for either
+        # the following file (extended) or all following files
+        # (global).
+        if self.type == XGLTYPE:
+            pax_headers = tarfile.pax_headers
+        else:
+            pax_headers = tarfile.pax_headers.copy()
+
+        # Check if the pax header contains a hdrcharset field. This tells us
+        # the encoding of the path, linkpath, uname and gname fields. Normally,
+        # these fields are UTF-8 encoded but since POSIX.1-2008 tar
+        # implementations are allowed to store them as raw binary strings if
+        # the translation to UTF-8 fails.
+        match = re.search(br"\d+ hdrcharset=([^\n]+)\n", buf)
+        if match is not None:
+            pax_headers["hdrcharset"] = match.group(1).decode("utf-8")
+
+        # For the time being, we don't care about anything other than "BINARY".
+        # The only other value that is currently allowed by the standard is
+        # "ISO-IR 10646 2000 UTF-8" in other words UTF-8.
+        hdrcharset = pax_headers.get("hdrcharset")
+        if hdrcharset == "BINARY":
+            encoding = tarfile.encoding
+        else:
+            encoding = "utf-8"
+
+        # Parse pax header information. A record looks like that:
+        # "%d %s=%s\n" % (length, keyword, value). length is the size
+        # of the complete record including the length field itself and
+        # the newline. keyword and value are both UTF-8 encoded strings.
+        regex = re.compile(br"(\d+) ([^=]+)=")
+        pos = 0
+        while match := regex.match(buf, pos):
+            length, keyword = match.groups()
+            length = int(length)
+            if length == 0:
+                raise InvalidHeaderError("invalid header")
+            value = buf[match.end(2) + 1:match.start(1) + length - 1]
+
+            # Normally, we could just use "utf-8" as the encoding and "strict"
+            # as the error handler, but we better not take the risk. For
+            # example, GNU tar <= 1.23 is known to store filenames it cannot
+            # translate to UTF-8 as raw strings (unfortunately without a
+            # hdrcharset=BINARY header).
+            # We first try the strict standard encoding, and if that fails we
+            # fall back on the user's encoding and error handler.
+            keyword = self._decode_pax_field(keyword, "utf-8", "utf-8",
+                    tarfile.errors)
+            if keyword in PAX_NAME_FIELDS:
+                value = self._decode_pax_field(value, encoding, tarfile.encoding,
+                        tarfile.errors)
+            else:
+                value = self._decode_pax_field(value, "utf-8", "utf-8",
+                        tarfile.errors)
+
+            pax_headers[keyword] = value
+            pos += length
+
+        # Fetch the next header.
+        try:
+            next = self.fromtarfile(tarfile)
+        except HeaderError as e:
+            raise SubsequentHeaderError(str(e)) from None
+
+        # Process GNU sparse information.
+        if "GNU.sparse.map" in pax_headers:
+            # GNU extended sparse format version 0.1.
+            self._proc_gnusparse_01(next, pax_headers)
+
+        elif "GNU.sparse.size" in pax_headers:
+            # GNU extended sparse format version 0.0.
+            self._proc_gnusparse_00(next, pax_headers, buf)
+
+        elif pax_headers.get("GNU.sparse.major") == "1" and pax_headers.get("GNU.sparse.minor") == "0":
+            # GNU extended sparse format version 1.0.
+            self._proc_gnusparse_10(next, pax_headers, tarfile)
+
+        if self.type in (XHDTYPE, SOLARIS_XHDTYPE):
+            # Patch the TarInfo object with the extended header info.
+            next._apply_pax_info(pax_headers, tarfile.encoding, tarfile.errors)
+            next.offset = self.offset
+
+            if "size" in pax_headers:
+                # If the extended header replaces the size field,
+                # we need to recalculate the offset where the next
+                # header starts.
+                offset = next.offset_data
+                if next.isreg() or next.type not in SUPPORTED_TYPES:
+                    offset += next._block(next.size)
+                tarfile.offset = offset
+
+        return next
+
+    def _proc_gnusparse_00(self, next, pax_headers, buf):
+        """Process a GNU tar extended sparse header, version 0.0.
+        """
+        offsets = []
+        for match in re.finditer(br"\d+ GNU.sparse.offset=(\d+)\n", buf):
+            offsets.append(int(match.group(1)))
+        numbytes = []
+        for match in re.finditer(br"\d+ GNU.sparse.numbytes=(\d+)\n", buf):
+            numbytes.append(int(match.group(1)))
+        next.sparse = list(zip(offsets, numbytes))
+
+    def _proc_gnusparse_01(self, next, pax_headers):
+        """Process a GNU tar extended sparse header, version 0.1.
+        """
+        sparse = [int(x) for x in pax_headers["GNU.sparse.map"].split(",")]
+        next.sparse = list(zip(sparse[::2], sparse[1::2]))
+
+    def _proc_gnusparse_10(self, next, pax_headers, tarfile):
+        """Process a GNU tar extended sparse header, version 1.0.
+        """
+        fields = None
+        sparse = []
+        buf = tarfile.fileobj.read(BLOCKSIZE)
+        fields, buf = buf.split(b"\n", 1)
+        fields = int(fields)
+        while len(sparse) < fields * 2:
+            if b"\n" not in buf:
+                buf += tarfile.fileobj.read(BLOCKSIZE)
+            number, buf = buf.split(b"\n", 1)
+            sparse.append(int(number))
+        next.offset_data = tarfile.fileobj.tell()
+        next.sparse = list(zip(sparse[::2], sparse[1::2]))
+
+    def _apply_pax_info(self, pax_headers, encoding, errors):
+        """Replace fields with supplemental information from a previous
+           pax extended or global header.
+        """
+        for keyword, value in pax_headers.items():
+            if keyword == "GNU.sparse.name":
+                setattr(self, "path", value)
+            elif keyword == "GNU.sparse.size":
+                setattr(self, "size", int(value))
+            elif keyword == "GNU.sparse.realsize":
+                setattr(self, "size", int(value))
+            elif keyword in PAX_FIELDS:
+                if keyword in PAX_NUMBER_FIELDS:
+                    try:
+                        value = PAX_NUMBER_FIELDS[keyword](value)
+                    except ValueError:
+                        value = 0
+                if keyword == "path":
+                    value = value.rstrip("/")
+                setattr(self, keyword, value)
+
+        self.pax_headers = pax_headers.copy()
+
+    def _decode_pax_field(self, value, encoding, fallback_encoding, fallback_errors):
+        """Decode a single field from a pax record.
+        """
+        try:
+            return value.decode(encoding, "strict")
+        except UnicodeDecodeError:
+            return value.decode(fallback_encoding, fallback_errors)
+
+    def _block(self, count):
+        """Round up a byte count by BLOCKSIZE and return it,
+           e.g. _block(834) => 1024.
+        """
+        blocks, remainder = divmod(count, BLOCKSIZE)
+        if remainder:
+            blocks += 1
+        return blocks * BLOCKSIZE
+
+    def isreg(self):
+        'Return True if the Tarinfo object is a regular file.'
+        return self.type in REGULAR_TYPES
+
+    def isfile(self):
+        'Return True if the Tarinfo object is a regular file.'
+        return self.isreg()
+
+    def isdir(self):
+        'Return True if it is a directory.'
+        return self.type == DIRTYPE
+
+    def issym(self):
+        'Return True if it is a symbolic link.'
+        return self.type == SYMTYPE
+
+    def islnk(self):
+        'Return True if it is a hard link.'
+        return self.type == LNKTYPE
+
+    def ischr(self):
+        'Return True if it is a character device.'
+        return self.type == CHRTYPE
+
+    def isblk(self):
+        'Return True if it is a block device.'
+        return self.type == BLKTYPE
+
+    def isfifo(self):
+        'Return True if it is a FIFO.'
+        return self.type == FIFOTYPE
+
+    def issparse(self):
+        return self.sparse is not None
+
+    def isdev(self):
+        'Return True if it is one of character device, block device or FIFO.'
+        return self.type in (CHRTYPE, BLKTYPE, FIFOTYPE)
+# class TarInfo
+
+class TarFile(object):
+    """The TarFile Class provides an interface to tar archives.
+    """
+
+    debug = 0                   # May be set from 0 (no msgs) to 3 (all msgs)
+
+    dereference = False         # If true, add content of linked file to the
+                                # tar file, else the link.
+
+    ignore_zeros = False        # If true, skips empty or invalid blocks and
+                                # continues processing.
+
+    errorlevel = 1              # If 0, fatal errors only appear in debug
+                                # messages (if debug >= 0). If > 0, errors
+                                # are passed to the caller as exceptions.
+
+    format = DEFAULT_FORMAT     # The format to use when creating an archive.
+
+    encoding = ENCODING         # Encoding for 8-bit character strings.
+
+    errors = None               # Error handler for unicode conversion.
+
+    tarinfo = TarInfo           # The default TarInfo class to use.
+
+    fileobject = ExFileObject   # The file-object for extractfile().
+
+    extraction_filter = None    # The default filter for extraction.
+
+    def __init__(self, name=None, mode="r", fileobj=None, format=None,
+            tarinfo=None, dereference=None, ignore_zeros=None, encoding=None,
+            errors="surrogateescape", pax_headers=None, debug=None,
+            errorlevel=None, copybufsize=None):
+        """Open an (uncompressed) tar archive `name'. `mode' is either 'r' to
+           read from an existing archive, 'a' to append data to an existing
+           file or 'w' to create a new file overwriting an existing one. `mode'
+           defaults to 'r'.
+           If `fileobj' is given, it is used for reading or writing data. If it
+           can be determined, `mode' is overridden by `fileobj's mode.
+           `fileobj' is not closed, when TarFile is closed.
+        """
+        modes = {"r": "rb", "a": "r+b", "w": "wb", "x": "xb"}
+        if mode not in modes:
+            raise ValueError("mode must be 'r', 'a', 'w' or 'x'")
+        self.mode = mode
+        self._mode = modes[mode]
+
+        if not fileobj:
+            if self.mode == "a" and not os.path.exists(name):
+                # Create nonexistent files in append mode.
+                self.mode = "w"
+                self._mode = "wb"
+            fileobj = bltn_open(name, self._mode)
+            self._extfileobj = False
+        else:
+            if (name is None and hasattr(fileobj, "name") and
+                isinstance(fileobj.name, (str, bytes))):
+                name = fileobj.name
+            if hasattr(fileobj, "mode"):
+                self._mode = fileobj.mode
+            self._extfileobj = True
+        self.name = os.path.abspath(name) if name else None
+        self.fileobj = fileobj
+
+        # Init attributes.
+        if format is not None:
+            self.format = format
+        if tarinfo is not None:
+            self.tarinfo = tarinfo
+        if dereference is not None:
+            self.dereference = dereference
+        if ignore_zeros is not None:
+            self.ignore_zeros = ignore_zeros
+        if encoding is not None:
+            self.encoding = encoding
+        self.errors = errors
+
+        if pax_headers is not None and self.format == PAX_FORMAT:
+            self.pax_headers = pax_headers
+        else:
+            self.pax_headers = {}
+
+        if debug is not None:
+            self.debug = debug
+        if errorlevel is not None:
+            self.errorlevel = errorlevel
+
+        # Init datastructures.
+        self.copybufsize = copybufsize
+        self.closed = False
+        self.members = []       # list of members as TarInfo objects
+        self._loaded = False    # flag if all members have been read
+        self.offset = self.fileobj.tell()
+                                # current position in the archive file
+        self.inodes = {}        # dictionary caching the inodes of
+                                # archive members already added
+
+        try:
+            if self.mode == "r":
+                self.firstmember = None
+                self.firstmember = self.next()
+
+            if self.mode == "a":
+                # Move to the end of the archive,
+                # before the first empty block.
+                while True:
+                    self.fileobj.seek(self.offset)
+                    try:
+                        tarinfo = self.tarinfo.fromtarfile(self)
+                        self.members.append(tarinfo)
+                    except EOFHeaderError:
+                        self.fileobj.seek(self.offset)
+                        break
+                    except HeaderError as e:
+                        raise ReadError(str(e)) from None
+
+            if self.mode in ("a", "w", "x"):
+                self._loaded = True
+
+                if self.pax_headers:
+                    buf = self.tarinfo.create_pax_global_header(self.pax_headers.copy())
+                    self.fileobj.write(buf)
+                    self.offset += len(buf)
+        except:
+            if not self._extfileobj:
+                self.fileobj.close()
+            self.closed = True
+            raise
+
+    #--------------------------------------------------------------------------
+    # Below are the classmethods which act as alternate constructors to the
+    # TarFile class. The open() method is the only one that is needed for
+    # public use; it is the "super"-constructor and is able to select an
+    # adequate "sub"-constructor for a particular compression using the mapping
+    # from OPEN_METH.
+    #
+    # This concept allows one to subclass TarFile without losing the comfort of
+    # the super-constructor. A sub-constructor is registered and made available
+    # by adding it to the mapping in OPEN_METH.
+
+    @classmethod
+    def open(cls, name=None, mode="r", fileobj=None, bufsize=RECORDSIZE, **kwargs):
+        r"""Open a tar archive for reading, writing or appending. Return
+           an appropriate TarFile class.
+
+           mode:
+           'r' or 'r:\*' open for reading with transparent compression
+           'r:'         open for reading exclusively uncompressed
+           'r:gz'       open for reading with gzip compression
+           'r:bz2'      open for reading with bzip2 compression
+           'r:xz'       open for reading with lzma compression
+           'a' or 'a:'  open for appending, creating the file if necessary
+           'w' or 'w:'  open for writing without compression
+           'w:gz'       open for writing with gzip compression
+           'w:bz2'      open for writing with bzip2 compression
+           'w:xz'       open for writing with lzma compression
+
+           'x' or 'x:'  create a tarfile exclusively without compression, raise
+                        an exception if the file is already created
+           'x:gz'       create a gzip compressed tarfile, raise an exception
+                        if the file is already created
+           'x:bz2'      create a bzip2 compressed tarfile, raise an exception
+                        if the file is already created
+           'x:xz'       create an lzma compressed tarfile, raise an exception
+                        if the file is already created
+
+           'r|\*'        open a stream of tar blocks with transparent compression
+           'r|'         open an uncompressed stream of tar blocks for reading
+           'r|gz'       open a gzip compressed stream of tar blocks
+           'r|bz2'      open a bzip2 compressed stream of tar blocks
+           'r|xz'       open an lzma compressed stream of tar blocks
+           'w|'         open an uncompressed stream for writing
+           'w|gz'       open a gzip compressed stream for writing
+           'w|bz2'      open a bzip2 compressed stream for writing
+           'w|xz'       open an lzma compressed stream for writing
+        """
+
+        if not name and not fileobj:
+            raise ValueError("nothing to open")
+
+        if mode in ("r", "r:*"):
+            # Find out which *open() is appropriate for opening the file.
+            def not_compressed(comptype):
+                return cls.OPEN_METH[comptype] == 'taropen'
+            error_msgs = []
+            for comptype in sorted(cls.OPEN_METH, key=not_compressed):
+                func = getattr(cls, cls.OPEN_METH[comptype])
+                if fileobj is not None:
+                    saved_pos = fileobj.tell()
+                try:
+                    return func(name, "r", fileobj, **kwargs)
+                except (ReadError, CompressionError) as e:
+                    error_msgs.append(f'- method {comptype}: {e!r}')
+                    if fileobj is not None:
+                        fileobj.seek(saved_pos)
+                    continue
+            error_msgs_summary = '\n'.join(error_msgs)
+            raise ReadError(f"file could not be opened successfully:\n{error_msgs_summary}")
+
+        elif ":" in mode:
+            filemode, comptype = mode.split(":", 1)
+            filemode = filemode or "r"
+            comptype = comptype or "tar"
+
+            # Select the *open() function according to
+            # given compression.
+            if comptype in cls.OPEN_METH:
+                func = getattr(cls, cls.OPEN_METH[comptype])
+            else:
+                raise CompressionError("unknown compression type %r" % comptype)
+            return func(name, filemode, fileobj, **kwargs)
+
+        elif "|" in mode:
+            filemode, comptype = mode.split("|", 1)
+            filemode = filemode or "r"
+            comptype = comptype or "tar"
+
+            if filemode not in ("r", "w"):
+                raise ValueError("mode must be 'r' or 'w'")
+
+            compresslevel = kwargs.pop("compresslevel", 9)
+            stream = _Stream(name, filemode, comptype, fileobj, bufsize,
+                             compresslevel)
+            try:
+                t = cls(name, filemode, stream, **kwargs)
+            except:
+                stream.close()
+                raise
+            t._extfileobj = False
+            return t
+
+        elif mode in ("a", "w", "x"):
+            return cls.taropen(name, mode, fileobj, **kwargs)
+
+        raise ValueError("undiscernible mode")
+
+    @classmethod
+    def taropen(cls, name, mode="r", fileobj=None, **kwargs):
+        """Open uncompressed tar archive name for reading or writing.
+        """
+        if mode not in ("r", "a", "w", "x"):
+            raise ValueError("mode must be 'r', 'a', 'w' or 'x'")
+        return cls(name, mode, fileobj, **kwargs)
+
+    @classmethod
+    def gzopen(cls, name, mode="r", fileobj=None, compresslevel=9, **kwargs):
+        """Open gzip compressed tar archive name for reading or writing.
+           Appending is not allowed.
+        """
+        if mode not in ("r", "w", "x"):
+            raise ValueError("mode must be 'r', 'w' or 'x'")
+
+        try:
+            from gzip import GzipFile
+        except ImportError:
+            raise CompressionError("gzip module is not available") from None
+
+        try:
+            fileobj = GzipFile(name, mode + "b", compresslevel, fileobj)
+        except OSError as e:
+            if fileobj is not None and mode == 'r':
+                raise ReadError("not a gzip file") from e
+            raise
+
+        try:
+            t = cls.taropen(name, mode, fileobj, **kwargs)
+        except OSError as e:
+            fileobj.close()
+            if mode == 'r':
+                raise ReadError("not a gzip file") from e
+            raise
+        except:
+            fileobj.close()
+            raise
+        t._extfileobj = False
+        return t
+
+    @classmethod
+    def bz2open(cls, name, mode="r", fileobj=None, compresslevel=9, **kwargs):
+        """Open bzip2 compressed tar archive name for reading or writing.
+           Appending is not allowed.
+        """
+        if mode not in ("r", "w", "x"):
+            raise ValueError("mode must be 'r', 'w' or 'x'")
+
+        try:
+            from bz2 import BZ2File
+        except ImportError:
+            raise CompressionError("bz2 module is not available") from None
+
+        fileobj = BZ2File(fileobj or name, mode, compresslevel=compresslevel)
+
+        try:
+            t = cls.taropen(name, mode, fileobj, **kwargs)
+        except (OSError, EOFError) as e:
+            fileobj.close()
+            if mode == 'r':
+                raise ReadError("not a bzip2 file") from e
+            raise
+        except:
+            fileobj.close()
+            raise
+        t._extfileobj = False
+        return t
+
+    @classmethod
+    def xzopen(cls, name, mode="r", fileobj=None, preset=None, **kwargs):
+        """Open lzma compressed tar archive name for reading or writing.
+           Appending is not allowed.
+        """
+        if mode not in ("r", "w", "x"):
+            raise ValueError("mode must be 'r', 'w' or 'x'")
+
+        try:
+            from lzma import LZMAFile, LZMAError
+        except ImportError:
+            raise CompressionError("lzma module is not available") from None
+
+        fileobj = LZMAFile(fileobj or name, mode, preset=preset)
+
+        try:
+            t = cls.taropen(name, mode, fileobj, **kwargs)
+        except (LZMAError, EOFError) as e:
+            fileobj.close()
+            if mode == 'r':
+                raise ReadError("not an lzma file") from e
+            raise
+        except:
+            fileobj.close()
+            raise
+        t._extfileobj = False
+        return t
+
+    # All *open() methods are registered here.
+    OPEN_METH = {
+        "tar": "taropen",   # uncompressed tar
+        "gz":  "gzopen",    # gzip compressed tar
+        "bz2": "bz2open",   # bzip2 compressed tar
+        "xz":  "xzopen"     # lzma compressed tar
+    }
+
+    #--------------------------------------------------------------------------
+    # The public methods which TarFile provides:
+
+    def close(self):
+        """Close the TarFile. In write-mode, two finishing zero blocks are
+           appended to the archive.
+        """
+        if self.closed:
+            return
+
+        self.closed = True
+        try:
+            if self.mode in ("a", "w", "x"):
+                self.fileobj.write(NUL * (BLOCKSIZE * 2))
+                self.offset += (BLOCKSIZE * 2)
+                # fill up the end with zero-blocks
+                # (like option -b20 for tar does)
+                blocks, remainder = divmod(self.offset, RECORDSIZE)
+                if remainder > 0:
+                    self.fileobj.write(NUL * (RECORDSIZE - remainder))
+        finally:
+            if not self._extfileobj:
+                self.fileobj.close()
+
+    def getmember(self, name):
+        """Return a TarInfo object for member ``name``. If ``name`` can not be
+           found in the archive, KeyError is raised. If a member occurs more
+           than once in the archive, its last occurrence is assumed to be the
+           most up-to-date version.
+        """
+        tarinfo = self._getmember(name.rstrip('/'))
+        if tarinfo is None:
+            raise KeyError("filename %r not found" % name)
+        return tarinfo
+
+    def getmembers(self):
+        """Return the members of the archive as a list of TarInfo objects. The
+           list has the same order as the members in the archive.
+        """
+        self._check()
+        if not self._loaded:    # if we want to obtain a list of
+            self._load()        # all members, we first have to
+                                # scan the whole archive.
+        return self.members
+
+    def getnames(self):
+        """Return the members of the archive as a list of their names. It has
+           the same order as the list returned by getmembers().
+        """
+        return [tarinfo.name for tarinfo in self.getmembers()]
+
+    def gettarinfo(self, name=None, arcname=None, fileobj=None):
+        """Create a TarInfo object from the result of os.stat or equivalent
+           on an existing file. The file is either named by ``name``, or
+           specified as a file object ``fileobj`` with a file descriptor. If
+           given, ``arcname`` specifies an alternative name for the file in the
+           archive, otherwise, the name is taken from the 'name' attribute of
+           'fileobj', or the 'name' argument. The name should be a text
+           string.
+        """
+        self._check("awx")
+
+        # When fileobj is given, replace name by
+        # fileobj's real name.
+        if fileobj is not None:
+            name = fileobj.name
+
+        # Building the name of the member in the archive.
+        # Backward slashes are converted to forward slashes,
+        # Absolute paths are turned to relative paths.
+        if arcname is None:
+            arcname = name
+        drv, arcname = os.path.splitdrive(arcname)
+        arcname = arcname.replace(os.sep, "/")
+        arcname = arcname.lstrip("/")
+
+        # Now, fill the TarInfo object with
+        # information specific for the file.
+        tarinfo = self.tarinfo()
+        tarinfo.tarfile = self  # Not needed
+
+        # Use os.stat or os.lstat, depending on if symlinks shall be resolved.
+        if fileobj is None:
+            if not self.dereference:
+                statres = os.lstat(name)
+            else:
+                statres = os.stat(name)
+        else:
+            statres = os.fstat(fileobj.fileno())
+        linkname = ""
+
+        stmd = statres.st_mode
+        if stat.S_ISREG(stmd):
+            inode = (statres.st_ino, statres.st_dev)
+            if not self.dereference and statres.st_nlink > 1 and \
+                    inode in self.inodes and arcname != self.inodes[inode]:
+                # Is it a hardlink to an already
+                # archived file?
+                type = LNKTYPE
+                linkname = self.inodes[inode]
+            else:
+                # The inode is added only if its valid.
+                # For win32 it is always 0.
+                type = REGTYPE
+                if inode[0]:
+                    self.inodes[inode] = arcname
+        elif stat.S_ISDIR(stmd):
+            type = DIRTYPE
+        elif stat.S_ISFIFO(stmd):
+            type = FIFOTYPE
+        elif stat.S_ISLNK(stmd):
+            type = SYMTYPE
+            linkname = os.readlink(name)
+        elif stat.S_ISCHR(stmd):
+            type = CHRTYPE
+        elif stat.S_ISBLK(stmd):
+            type = BLKTYPE
+        else:
+            return None
+
+        # Fill the TarInfo object with all
+        # information we can get.
+        tarinfo.name = arcname
+        tarinfo.mode = stmd
+        tarinfo.uid = statres.st_uid
+        tarinfo.gid = statres.st_gid
+        if type == REGTYPE:
+            tarinfo.size = statres.st_size
+        else:
+            tarinfo.size = 0
+        tarinfo.mtime = statres.st_mtime
+        tarinfo.type = type
+        tarinfo.linkname = linkname
+        if pwd:
+            try:
+                tarinfo.uname = pwd.getpwuid(tarinfo.uid)[0]
+            except KeyError:
+                pass
+        if grp:
+            try:
+                tarinfo.gname = grp.getgrgid(tarinfo.gid)[0]
+            except KeyError:
+                pass
+
+        if type in (CHRTYPE, BLKTYPE):
+            if hasattr(os, "major") and hasattr(os, "minor"):
+                tarinfo.devmajor = os.major(statres.st_rdev)
+                tarinfo.devminor = os.minor(statres.st_rdev)
+        return tarinfo
+
+    def list(self, verbose=True, *, members=None):
+        """Print a table of contents to sys.stdout. If ``verbose`` is False, only
+           the names of the members are printed. If it is True, an `ls -l'-like
+           output is produced. ``members`` is optional and must be a subset of the
+           list returned by getmembers().
+        """
+        self._check()
+
+        if members is None:
+            members = self
+        for tarinfo in members:
+            if verbose:
+                if tarinfo.mode is None:
+                    _safe_print("??????????")
+                else:
+                    _safe_print(stat.filemode(tarinfo.mode))
+                _safe_print("%s/%s" % (tarinfo.uname or tarinfo.uid,
+                                       tarinfo.gname or tarinfo.gid))
+                if tarinfo.ischr() or tarinfo.isblk():
+                    _safe_print("%10s" %
+                            ("%d,%d" % (tarinfo.devmajor, tarinfo.devminor)))
+                else:
+                    _safe_print("%10d" % tarinfo.size)
+                if tarinfo.mtime is None:
+                    _safe_print("????-??-?? ??:??:??")
+                else:
+                    _safe_print("%d-%02d-%02d %02d:%02d:%02d" \
+                                % time.localtime(tarinfo.mtime)[:6])
+
+            _safe_print(tarinfo.name + ("/" if tarinfo.isdir() else ""))
+
+            if verbose:
+                if tarinfo.issym():
+                    _safe_print("-> " + tarinfo.linkname)
+                if tarinfo.islnk():
+                    _safe_print("link to " + tarinfo.linkname)
+            print()
+
+    def add(self, name, arcname=None, recursive=True, *, filter=None):
+        """Add the file ``name`` to the archive. ``name`` may be any type of file
+           (directory, fifo, symbolic link, etc.). If given, ``arcname``
+           specifies an alternative name for the file in the archive.
+           Directories are added recursively by default. This can be avoided by
+           setting ``recursive`` to False. ``filter`` is a function
+           that expects a TarInfo object argument and returns the changed
+           TarInfo object, if it returns None the TarInfo object will be
+           excluded from the archive.
+        """
+        self._check("awx")
+
+        if arcname is None:
+            arcname = name
+
+        # Skip if somebody tries to archive the archive...
+        if self.name is not None and os.path.abspath(name) == self.name:
+            self._dbg(2, "tarfile: Skipped %r" % name)
+            return
+
+        self._dbg(1, name)
+
+        # Create a TarInfo object from the file.
+        tarinfo = self.gettarinfo(name, arcname)
+
+        if tarinfo is None:
+            self._dbg(1, "tarfile: Unsupported type %r" % name)
+            return
+
+        # Change or exclude the TarInfo object.
+        if filter is not None:
+            tarinfo = filter(tarinfo)
+            if tarinfo is None:
+                self._dbg(2, "tarfile: Excluded %r" % name)
+                return
+
+        # Append the tar header and data to the archive.
+        if tarinfo.isreg():
+            with bltn_open(name, "rb") as f:
+                self.addfile(tarinfo, f)
+
+        elif tarinfo.isdir():
+            self.addfile(tarinfo)
+            if recursive:
+                for f in sorted(os.listdir(name)):
+                    self.add(os.path.join(name, f), os.path.join(arcname, f),
+                            recursive, filter=filter)
+
+        else:
+            self.addfile(tarinfo)
+
+    def addfile(self, tarinfo, fileobj=None):
+        """Add the TarInfo object ``tarinfo`` to the archive. If ``fileobj`` is
+           given, it should be a binary file, and tarinfo.size bytes are read
+           from it and added to the archive. You can create TarInfo objects
+           directly, or by using gettarinfo().
+        """
+        self._check("awx")
+
+        tarinfo = copy.copy(tarinfo)
+
+        buf = tarinfo.tobuf(self.format, self.encoding, self.errors)
+        self.fileobj.write(buf)
+        self.offset += len(buf)
+        bufsize=self.copybufsize
+        # If there's data to follow, append it.
+        if fileobj is not None:
+            copyfileobj(fileobj, self.fileobj, tarinfo.size, bufsize=bufsize)
+            blocks, remainder = divmod(tarinfo.size, BLOCKSIZE)
+            if remainder > 0:
+                self.fileobj.write(NUL * (BLOCKSIZE - remainder))
+                blocks += 1
+            self.offset += blocks * BLOCKSIZE
+
+        self.members.append(tarinfo)
+
+    def _get_filter_function(self, filter):
+        if filter is None:
+            filter = self.extraction_filter
+            if filter is None:
+                warnings.warn(
+                    'Python 3.14 will, by default, filter extracted tar '
+                    + 'archives and reject files or modify their metadata. '
+                    + 'Use the filter argument to control this behavior.',
+                    DeprecationWarning)
+                return fully_trusted_filter
+            if isinstance(filter, str):
+                raise TypeError(
+                    'String names are not supported for '
+                    + 'TarFile.extraction_filter. Use a function such as '
+                    + 'tarfile.data_filter directly.')
+            return filter
+        if callable(filter):
+            return filter
+        try:
+            return _NAMED_FILTERS[filter]
+        except KeyError:
+            raise ValueError(f"filter {filter!r} not found") from None
+
+    def extractall(self, path=".", members=None, *, numeric_owner=False,
+                   filter=None):
+        """Extract all members from the archive to the current working
+           directory and set owner, modification time and permissions on
+           directories afterwards. `path' specifies a different directory
+           to extract to. `members' is optional and must be a subset of the
+           list returned by getmembers(). If `numeric_owner` is True, only
+           the numbers for user/group names are used and not the names.
+
+           The `filter` function will be called on each member just
+           before extraction.
+           It can return a changed TarInfo or None to skip the member.
+           String names of common filters are accepted.
+        """
+        directories = []
+
+        filter_function = self._get_filter_function(filter)
+        if members is None:
+            members = self
+
+        for member in members:
+            tarinfo = self._get_extract_tarinfo(member, filter_function, path)
+            if tarinfo is None:
+                continue
+            if tarinfo.isdir():
+                # For directories, delay setting attributes until later,
+                # since permissions can interfere with extraction and
+                # extracting contents can reset mtime.
+                directories.append(tarinfo)
+            self._extract_one(tarinfo, path, set_attrs=not tarinfo.isdir(),
+                              numeric_owner=numeric_owner)
+
+        # Reverse sort directories.
+        directories.sort(key=lambda a: a.name, reverse=True)
+
+        # Set correct owner, mtime and filemode on directories.
+        for tarinfo in directories:
+            dirpath = os.path.join(path, tarinfo.name)
+            try:
+                self.chown(tarinfo, dirpath, numeric_owner=numeric_owner)
+                self.utime(tarinfo, dirpath)
+                self.chmod(tarinfo, dirpath)
+            except ExtractError as e:
+                self._handle_nonfatal_error(e)
+
+    def extract(self, member, path="", set_attrs=True, *, numeric_owner=False,
+                filter=None):
+        """Extract a member from the archive to the current working directory,
+           using its full name. Its file information is extracted as accurately
+           as possible. `member' may be a filename or a TarInfo object. You can
+           specify a different directory using `path'. File attributes (owner,
+           mtime, mode) are set unless `set_attrs' is False. If `numeric_owner`
+           is True, only the numbers for user/group names are used and not
+           the names.
+
+           The `filter` function will be called before extraction.
+           It can return a changed TarInfo or None to skip the member.
+           String names of common filters are accepted.
+        """
+        filter_function = self._get_filter_function(filter)
+        tarinfo = self._get_extract_tarinfo(member, filter_function, path)
+        if tarinfo is not None:
+            self._extract_one(tarinfo, path, set_attrs, numeric_owner)
+
+    def _get_extract_tarinfo(self, member, filter_function, path):
+        """Get filtered TarInfo (or None) from member, which might be a str"""
+        if isinstance(member, str):
+            tarinfo = self.getmember(member)
+        else:
+            tarinfo = member
+
+        unfiltered = tarinfo
+        try:
+            tarinfo = filter_function(tarinfo, path)
+        except (OSError, FilterError) as e:
+            self._handle_fatal_error(e)
+        except ExtractError as e:
+            self._handle_nonfatal_error(e)
+        if tarinfo is None:
+            self._dbg(2, "tarfile: Excluded %r" % unfiltered.name)
+            return None
+        # Prepare the link target for makelink().
+        if tarinfo.islnk():
+            tarinfo = copy.copy(tarinfo)
+            tarinfo._link_target = os.path.join(path, tarinfo.linkname)
+        return tarinfo
+
+    def _extract_one(self, tarinfo, path, set_attrs, numeric_owner):
+        """Extract from filtered tarinfo to disk"""
+        self._check("r")
+
+        try:
+            self._extract_member(tarinfo, os.path.join(path, tarinfo.name),
+                                 set_attrs=set_attrs,
+                                 numeric_owner=numeric_owner)
+        except OSError as e:
+            self._handle_fatal_error(e)
+        except ExtractError as e:
+            self._handle_nonfatal_error(e)
+
+    def _handle_nonfatal_error(self, e):
+        """Handle non-fatal error (ExtractError) according to errorlevel"""
+        if self.errorlevel > 1:
+            raise
+        else:
+            self._dbg(1, "tarfile: %s" % e)
+
+    def _handle_fatal_error(self, e):
+        """Handle "fatal" error according to self.errorlevel"""
+        if self.errorlevel > 0:
+            raise
+        elif isinstance(e, OSError):
+            if e.filename is None:
+                self._dbg(1, "tarfile: %s" % e.strerror)
+            else:
+                self._dbg(1, "tarfile: %s %r" % (e.strerror, e.filename))
+        else:
+            self._dbg(1, "tarfile: %s %s" % (type(e).__name__, e))
+
+    def extractfile(self, member):
+        """Extract a member from the archive as a file object. ``member`` may be
+           a filename or a TarInfo object. If ``member`` is a regular file or
+           a link, an io.BufferedReader object is returned. For all other
+           existing members, None is returned. If ``member`` does not appear
+           in the archive, KeyError is raised.
+        """
+        self._check("r")
+
+        if isinstance(member, str):
+            tarinfo = self.getmember(member)
+        else:
+            tarinfo = member
+
+        if tarinfo.isreg() or tarinfo.type not in SUPPORTED_TYPES:
+            # Members with unknown types are treated as regular files.
+            return self.fileobject(self, tarinfo)
+
+        elif tarinfo.islnk() or tarinfo.issym():
+            if isinstance(self.fileobj, _Stream):
+                # A small but ugly workaround for the case that someone tries
+                # to extract a (sym)link as a file-object from a non-seekable
+                # stream of tar blocks.
+                raise StreamError("cannot extract (sym)link as file object")
+            else:
+                # A (sym)link's file object is its target's file object.
+                return self.extractfile(self._find_link_target(tarinfo))
+        else:
+            # If there's no data associated with the member (directory, chrdev,
+            # blkdev, etc.), return None instead of a file object.
+            return None
+
+    def _extract_member(self, tarinfo, targetpath, set_attrs=True,
+                        numeric_owner=False):
+        """Extract the TarInfo object tarinfo to a physical
+           file called targetpath.
+        """
+        # Fetch the TarInfo object for the given name
+        # and build the destination pathname, replacing
+        # forward slashes to platform specific separators.
+        targetpath = targetpath.rstrip("/")
+        targetpath = targetpath.replace("/", os.sep)
+
+        # Create all upper directories.
+        upperdirs = os.path.dirname(targetpath)
+        if upperdirs and not os.path.exists(upperdirs):
+            # Create directories that are not part of the archive with
+            # default permissions.
+            os.makedirs(upperdirs)
+
+        if tarinfo.islnk() or tarinfo.issym():
+            self._dbg(1, "%s -> %s" % (tarinfo.name, tarinfo.linkname))
+        else:
+            self._dbg(1, tarinfo.name)
+
+        if tarinfo.isreg():
+            self.makefile(tarinfo, targetpath)
+        elif tarinfo.isdir():
+            self.makedir(tarinfo, targetpath)
+        elif tarinfo.isfifo():
+            self.makefifo(tarinfo, targetpath)
+        elif tarinfo.ischr() or tarinfo.isblk():
+            self.makedev(tarinfo, targetpath)
+        elif tarinfo.islnk() or tarinfo.issym():
+            self.makelink(tarinfo, targetpath)
+        elif tarinfo.type not in SUPPORTED_TYPES:
+            self.makeunknown(tarinfo, targetpath)
+        else:
+            self.makefile(tarinfo, targetpath)
+
+        if set_attrs:
+            self.chown(tarinfo, targetpath, numeric_owner)
+            if not tarinfo.issym():
+                self.chmod(tarinfo, targetpath)
+                self.utime(tarinfo, targetpath)
+
+    #--------------------------------------------------------------------------
+    # Below are the different file methods. They are called via
+    # _extract_member() when extract() is called. They can be replaced in a
+    # subclass to implement other functionality.
+
+    def makedir(self, tarinfo, targetpath):
+        """Make a directory called targetpath.
+        """
+        try:
+            if tarinfo.mode is None:
+                # Use the system's default mode
+                os.mkdir(targetpath)
+            else:
+                # Use a safe mode for the directory, the real mode is set
+                # later in _extract_member().
+                os.mkdir(targetpath, 0o700)
+        except FileExistsError:
+            if not os.path.isdir(targetpath):
+                raise
+
+    def makefile(self, tarinfo, targetpath):
+        """Make a file called targetpath.
+        """
+        source = self.fileobj
+        source.seek(tarinfo.offset_data)
+        bufsize = self.copybufsize
+        with bltn_open(targetpath, "wb") as target:
+            if tarinfo.sparse is not None:
+                for offset, size in tarinfo.sparse:
+                    target.seek(offset)
+                    copyfileobj(source, target, size, ReadError, bufsize)
+                target.seek(tarinfo.size)
+                target.truncate()
+            else:
+                copyfileobj(source, target, tarinfo.size, ReadError, bufsize)
+
+    def makeunknown(self, tarinfo, targetpath):
+        """Make a file from a TarInfo object with an unknown type
+           at targetpath.
+        """
+        self.makefile(tarinfo, targetpath)
+        self._dbg(1, "tarfile: Unknown file type %r, " \
+                     "extracted as regular file." % tarinfo.type)
+
+    def makefifo(self, tarinfo, targetpath):
+        """Make a fifo called targetpath.
+        """
+        if hasattr(os, "mkfifo"):
+            os.mkfifo(targetpath)
+        else:
+            raise ExtractError("fifo not supported by system")
+
+    def makedev(self, tarinfo, targetpath):
+        """Make a character or block device called targetpath.
+        """
+        if not hasattr(os, "mknod") or not hasattr(os, "makedev"):
+            raise ExtractError("special devices not supported by system")
+
+        mode = tarinfo.mode
+        if mode is None:
+            # Use mknod's default
+            mode = 0o600
+        if tarinfo.isblk():
+            mode |= stat.S_IFBLK
+        else:
+            mode |= stat.S_IFCHR
+
+        os.mknod(targetpath, mode,
+                 os.makedev(tarinfo.devmajor, tarinfo.devminor))
+
+    def makelink(self, tarinfo, targetpath):
+        """Make a (symbolic) link called targetpath. If it cannot be created
+          (platform limitation), we try to make a copy of the referenced file
+          instead of a link.
+        """
+        try:
+            # For systems that support symbolic and hard links.
+            if tarinfo.issym():
+                if os.path.lexists(targetpath):
+                    # Avoid FileExistsError on following os.symlink.
+                    os.unlink(targetpath)
+                os.symlink(tarinfo.linkname, targetpath)
+            else:
+                if os.path.exists(tarinfo._link_target):
+                    os.link(tarinfo._link_target, targetpath)
+                else:
+                    self._extract_member(self._find_link_target(tarinfo),
+                                         targetpath)
+        except symlink_exception:
+            try:
+                self._extract_member(self._find_link_target(tarinfo),
+                                     targetpath)
+            except KeyError:
+                raise ExtractError("unable to resolve link inside archive") from None
+
+    def chown(self, tarinfo, targetpath, numeric_owner):
+        """Set owner of targetpath according to tarinfo. If numeric_owner
+           is True, use .gid/.uid instead of .gname/.uname. If numeric_owner
+           is False, fall back to .gid/.uid when the search based on name
+           fails.
+        """
+        if hasattr(os, "geteuid") and os.geteuid() == 0:
+            # We have to be root to do so.
+            g = tarinfo.gid
+            u = tarinfo.uid
+            if not numeric_owner:
+                try:
+                    if grp and tarinfo.gname:
+                        g = grp.getgrnam(tarinfo.gname)[2]
+                except KeyError:
+                    pass
+                try:
+                    if pwd and tarinfo.uname:
+                        u = pwd.getpwnam(tarinfo.uname)[2]
+                except KeyError:
+                    pass
+            if g is None:
+                g = -1
+            if u is None:
+                u = -1
+            try:
+                if tarinfo.issym() and hasattr(os, "lchown"):
+                    os.lchown(targetpath, u, g)
+                else:
+                    os.chown(targetpath, u, g)
+            except OSError as e:
+                raise ExtractError("could not change owner") from e
+
+    def chmod(self, tarinfo, targetpath):
+        """Set file permissions of targetpath according to tarinfo.
+        """
+        if tarinfo.mode is None:
+            return
+        try:
+            os.chmod(targetpath, tarinfo.mode)
+        except OSError as e:
+            raise ExtractError("could not change mode") from e
+
+    def utime(self, tarinfo, targetpath):
+        """Set modification time of targetpath according to tarinfo.
+        """
+        mtime = tarinfo.mtime
+        if mtime is None:
+            return
+        if not hasattr(os, 'utime'):
+            return
+        try:
+            os.utime(targetpath, (mtime, mtime))
+        except OSError as e:
+            raise ExtractError("could not change modification time") from e
+
+    #--------------------------------------------------------------------------
+    def next(self):
+        """Return the next member of the archive as a TarInfo object, when
+           TarFile is opened for reading. Return None if there is no more
+           available.
+        """
+        self._check("ra")
+        if self.firstmember is not None:
+            m = self.firstmember
+            self.firstmember = None
+            return m
+
+        # Advance the file pointer.
+        if self.offset != self.fileobj.tell():
+            if self.offset == 0:
+                return None
+            self.fileobj.seek(self.offset - 1)
+            if not self.fileobj.read(1):
+                raise ReadError("unexpected end of data")
+
+        # Read the next block.
+        tarinfo = None
+        while True:
+            try:
+                tarinfo = self.tarinfo.fromtarfile(self)
+            except EOFHeaderError as e:
+                if self.ignore_zeros:
+                    self._dbg(2, "0x%X: %s" % (self.offset, e))
+                    self.offset += BLOCKSIZE
+                    continue
+            except InvalidHeaderError as e:
+                if self.ignore_zeros:
+                    self._dbg(2, "0x%X: %s" % (self.offset, e))
+                    self.offset += BLOCKSIZE
+                    continue
+                elif self.offset == 0:
+                    raise ReadError(str(e)) from None
+            except EmptyHeaderError:
+                if self.offset == 0:
+                    raise ReadError("empty file") from None
+            except TruncatedHeaderError as e:
+                if self.offset == 0:
+                    raise ReadError(str(e)) from None
+            except SubsequentHeaderError as e:
+                raise ReadError(str(e)) from None
+            except Exception as e:
+                try:
+                    import zlib
+                    if isinstance(e, zlib.error):
+                        raise ReadError(f'zlib error: {e}') from None
+                    else:
+                        raise e
+                except ImportError:
+                    raise e
+            break
+
+        if tarinfo is not None:
+            self.members.append(tarinfo)
+        else:
+            self._loaded = True
+
+        return tarinfo
+
+    #--------------------------------------------------------------------------
+    # Little helper methods:
+
+    def _getmember(self, name, tarinfo=None, normalize=False):
+        """Find an archive member by name from bottom to top.
+           If tarinfo is given, it is used as the starting point.
+        """
+        # Ensure that all members have been loaded.
+        members = self.getmembers()
+
+        # Limit the member search list up to tarinfo.
+        skipping = False
+        if tarinfo is not None:
+            try:
+                index = members.index(tarinfo)
+            except ValueError:
+                # The given starting point might be a (modified) copy.
+                # We'll later skip members until we find an equivalent.
+                skipping = True
+            else:
+                # Happy fast path
+                members = members[:index]
+
+        if normalize:
+            name = os.path.normpath(name)
+
+        for member in reversed(members):
+            if skipping:
+                if tarinfo.offset == member.offset:
+                    skipping = False
+                continue
+            if normalize:
+                member_name = os.path.normpath(member.name)
+            else:
+                member_name = member.name
+
+            if name == member_name:
+                return member
+
+        if skipping:
+            # Starting point was not found
+            raise ValueError(tarinfo)
+
+    def _load(self):
+        """Read through the entire archive file and look for readable
+           members.
+        """
+        while self.next() is not None:
+            pass
+        self._loaded = True
+
+    def _check(self, mode=None):
+        """Check if TarFile is still open, and if the operation's mode
+           corresponds to TarFile's mode.
+        """
+        if self.closed:
+            raise OSError("%s is closed" % self.__class__.__name__)
+        if mode is not None and self.mode not in mode:
+            raise OSError("bad operation for mode %r" % self.mode)
+
+    def _find_link_target(self, tarinfo):
+        """Find the target member of a symlink or hardlink member in the
+           archive.
+        """
+        if tarinfo.issym():
+            # Always search the entire archive.
+            linkname = "/".join(filter(None, (os.path.dirname(tarinfo.name), tarinfo.linkname)))
+            limit = None
+        else:
+            # Search the archive before the link, because a hard link is
+            # just a reference to an already archived file.
+            linkname = tarinfo.linkname
+            limit = tarinfo
+
+        member = self._getmember(linkname, tarinfo=limit, normalize=True)
+        if member is None:
+            raise KeyError("linkname %r not found" % linkname)
+        return member
+
+    def __iter__(self):
+        """Provide an iterator object.
+        """
+        if self._loaded:
+            yield from self.members
+            return
+
+        # Yield items using TarFile's next() method.
+        # When all members have been read, set TarFile as _loaded.
+        index = 0
+        # Fix for SF #1100429: Under rare circumstances it can
+        # happen that getmembers() is called during iteration,
+        # which will have already exhausted the next() method.
+        if self.firstmember is not None:
+            tarinfo = self.next()
+            index += 1
+            yield tarinfo
+
+        while True:
+            if index < len(self.members):
+                tarinfo = self.members[index]
+            elif not self._loaded:
+                tarinfo = self.next()
+                if not tarinfo:
+                    self._loaded = True
+                    return
+            else:
+                return
+            index += 1
+            yield tarinfo
+
+    def _dbg(self, level, msg):
+        """Write debugging output to sys.stderr.
+        """
+        if level <= self.debug:
+            print(msg, file=sys.stderr)
+
+    def __enter__(self):
+        self._check()
+        return self
+
+    def __exit__(self, type, value, traceback):
+        if type is None:
+            self.close()
+        else:
+            # An exception occurred. We must not call close() because
+            # it would try to write end-of-archive blocks and padding.
+            if not self._extfileobj:
+                self.fileobj.close()
+            self.closed = True
+
+#--------------------
+# exported functions
+#--------------------
+
+def is_tarfile(name):
+    """Return True if name points to a tar archive that we
+       are able to handle, else return False.
+
+       'name' should be a string, file, or file-like object.
+    """
+    try:
+        if hasattr(name, "read"):
+            pos = name.tell()
+            t = open(fileobj=name)
+            name.seek(pos)
+        else:
+            t = open(name)
+        t.close()
+        return True
+    except TarError:
+        return False
+
+open = TarFile.open
+
+
+def main():
+    import argparse
+
+    description = 'A simple command-line interface for tarfile module.'
+    parser = argparse.ArgumentParser(description=description)
+    parser.add_argument('-v', '--verbose', action='store_true', default=False,
+                        help='Verbose output')
+    parser.add_argument('--filter', metavar='<filtername>',
+                        choices=_NAMED_FILTERS,
+                        help='Filter for extraction')
+
+    group = parser.add_mutually_exclusive_group(required=True)
+    group.add_argument('-l', '--list', metavar='<tarfile>',
+                       help='Show listing of a tarfile')
+    group.add_argument('-e', '--extract', nargs='+',
+                       metavar=('<tarfile>', '<output_dir>'),
+                       help='Extract tarfile into target dir')
+    group.add_argument('-c', '--create', nargs='+',
+                       metavar=('<name>', '<file>'),
+                       help='Create tarfile from sources')
+    group.add_argument('-t', '--test', metavar='<tarfile>',
+                       help='Test if a tarfile is valid')
+
+    args = parser.parse_args()
+
+    if args.filter and args.extract is None:
+        parser.exit(1, '--filter is only valid for extraction\n')
+
+    if args.test is not None:
+        src = args.test
+        if is_tarfile(src):
+            with open(src, 'r') as tar:
+                tar.getmembers()
+                print(tar.getmembers(), file=sys.stderr)
+            if args.verbose:
+                print('{!r} is a tar archive.'.format(src))
+        else:
+            parser.exit(1, '{!r} is not a tar archive.\n'.format(src))
+
+    elif args.list is not None:
+        src = args.list
+        if is_tarfile(src):
+            with TarFile.open(src, 'r:*') as tf:
+                tf.list(verbose=args.verbose)
+        else:
+            parser.exit(1, '{!r} is not a tar archive.\n'.format(src))
+
+    elif args.extract is not None:
+        if len(args.extract) == 1:
+            src = args.extract[0]
+            curdir = os.curdir
+        elif len(args.extract) == 2:
+            src, curdir = args.extract
+        else:
+            parser.exit(1, parser.format_help())
+
+        if is_tarfile(src):
+            with TarFile.open(src, 'r:*') as tf:
+                tf.extractall(path=curdir, filter=args.filter)
+            if args.verbose:
+                if curdir == '.':
+                    msg = '{!r} file is extracted.'.format(src)
+                else:
+                    msg = ('{!r} file is extracted '
+                           'into {!r} directory.').format(src, curdir)
+                print(msg)
+        else:
+            parser.exit(1, '{!r} is not a tar archive.\n'.format(src))
+
+    elif args.create is not None:
+        tar_name = args.create.pop(0)
+        _, ext = os.path.splitext(tar_name)
+        compressions = {
+            # gz
+            '.gz': 'gz',
+            '.tgz': 'gz',
+            # xz
+            '.xz': 'xz',
+            '.txz': 'xz',
+            # bz2
+            '.bz2': 'bz2',
+            '.tbz': 'bz2',
+            '.tbz2': 'bz2',
+            '.tb2': 'bz2',
+        }
+        tar_mode = 'w:' + compressions[ext] if ext in compressions else 'w'
+        tar_files = args.create
+
+        with TarFile.open(tar_name, tar_mode) as tf:
+            for file_name in tar_files:
+                tf.add(file_name)
+
+        if args.verbose:
+            print('{!r} file created.'.format(tar_name))
+
+if __name__ == '__main__':
+    main()
diff --git a/lib/backports/tarfile/__main__.py b/lib/backports/tarfile/__main__.py
new file mode 100644
index 00000000..daf55090
--- /dev/null
+++ b/lib/backports/tarfile/__main__.py
@@ -0,0 +1,5 @@
+from . import main
+
+
+if __name__ == '__main__':
+    main()
diff --git a/lib/inflect/compat/__init__.py b/lib/backports/tarfile/compat/__init__.py
similarity index 100%
rename from lib/inflect/compat/__init__.py
rename to lib/backports/tarfile/compat/__init__.py
diff --git a/lib/backports/tarfile/compat/py38.py b/lib/backports/tarfile/compat/py38.py
new file mode 100644
index 00000000..20fbbfc1
--- /dev/null
+++ b/lib/backports/tarfile/compat/py38.py
@@ -0,0 +1,24 @@
+import sys
+
+
+if sys.version_info < (3, 9):
+
+    def removesuffix(self, suffix):
+        # suffix='' should not call self[:-0].
+        if suffix and self.endswith(suffix):
+            return self[: -len(suffix)]
+        else:
+            return self[:]
+
+    def removeprefix(self, prefix):
+        if self.startswith(prefix):
+            return self[len(prefix) :]
+        else:
+            return self[:]
+else:
+
+    def removesuffix(self, suffix):
+        return self.removesuffix(suffix)
+
+    def removeprefix(self, prefix):
+        return self.removeprefix(prefix)
diff --git a/lib/future/__init__.py b/lib/future/__init__.py
index b609299a..b097fd81 100644
--- a/lib/future/__init__.py
+++ b/lib/future/__init__.py
@@ -52,7 +52,7 @@ Automatic conversion
 --------------------
 
 An included script called `futurize
-<http://python-future.org/automatic_conversion.html>`_ aids in converting
+<https://python-future.org/automatic_conversion.html>`_ aids in converting
 code (from either Python 2 or Python 3) to code compatible with both
 platforms. It is similar to ``python-modernize`` but goes further in
 providing Python 3 compatibility through the use of the backported types
@@ -62,21 +62,20 @@ and builtin functions in ``future``.
 Documentation
 -------------
 
-See: http://python-future.org
+See: https://python-future.org
 
 
 Credits
 -------
 
 :Author:  Ed Schofield, Jordan M. Adler, et al
-:Sponsor: Python Charmers Pty Ltd, Australia, and Python Charmers Pte
-          Ltd, Singapore. http://pythoncharmers.com
-:Others:  See docs/credits.rst or http://python-future.org/credits.html
+:Sponsor: Python Charmers: https://pythoncharmers.com
+:Others:  See docs/credits.rst or https://python-future.org/credits.html
 
 
 Licensing
 ---------
-Copyright 2013-2019 Python Charmers Pty Ltd, Australia.
+Copyright 2013-2024 Python Charmers, Australia.
 The software is distributed under an MIT licence. See LICENSE.txt.
 
 """
@@ -84,10 +83,10 @@ The software is distributed under an MIT licence. See LICENSE.txt.
 __title__ = 'future'
 __author__ = 'Ed Schofield'
 __license__ = 'MIT'
-__copyright__ = 'Copyright 2013-2019 Python Charmers Pty Ltd'
-__ver_major__ = 0
-__ver_minor__ = 18
-__ver_patch__ = 3
+__copyright__ = 'Copyright 2013-2024 Python Charmers (https://pythoncharmers.com)'
+__ver_major__ = 1
+__ver_minor__ = 0
+__ver_patch__ = 0
 __ver_sub__ = ''
 __version__ = "%d.%d.%d%s" % (__ver_major__, __ver_minor__,
                               __ver_patch__, __ver_sub__)
diff --git a/lib/future/backports/datetime.py b/lib/future/backports/datetime.py
index 3261014e..8cd62ddf 100644
--- a/lib/future/backports/datetime.py
+++ b/lib/future/backports/datetime.py
@@ -689,7 +689,7 @@ class date(object):
 
     @classmethod
     def fromordinal(cls, n):
-        """Contruct a date from a proleptic Gregorian ordinal.
+        """Construct a date from a proleptic Gregorian ordinal.
 
         January 1 of year 1 is day 1.  Only the year, month and day are
         non-zero in the result.
diff --git a/lib/future/backports/email/_header_value_parser.py b/lib/future/backports/email/_header_value_parser.py
index 43957edc..59b1b318 100644
--- a/lib/future/backports/email/_header_value_parser.py
+++ b/lib/future/backports/email/_header_value_parser.py
@@ -2867,7 +2867,7 @@ def parse_content_type_header(value):
         _find_mime_parameters(ctype, value)
         return ctype
     ctype.append(token)
-    # XXX: If we really want to follow the formal grammer we should make
+    # XXX: If we really want to follow the formal grammar we should make
     # mantype and subtype specialized TokenLists here.  Probably not worth it.
     if not value or value[0] != '/':
         ctype.defects.append(errors.InvalidHeaderDefect(
diff --git a/lib/future/backports/email/parser.py b/lib/future/backports/email/parser.py
index df1c6e28..79f0e5a3 100644
--- a/lib/future/backports/email/parser.py
+++ b/lib/future/backports/email/parser.py
@@ -26,7 +26,7 @@ class Parser(object):
         textual representation of the message.
 
         The string must be formatted as a block of RFC 2822 headers and header
-        continuation lines, optionally preceeded by a `Unix-from' header.  The
+        continuation lines, optionally preceded by a `Unix-from' header.  The
         header block is terminated either by the end of the string or by a
         blank line.
 
@@ -92,7 +92,7 @@ class BytesParser(object):
         textual representation of the message.
 
         The input must be formatted as a block of RFC 2822 headers and header
-        continuation lines, optionally preceeded by a `Unix-from' header.  The
+        continuation lines, optionally preceded by a `Unix-from' header.  The
         header block is terminated either by the end of the input or by a
         blank line.
 
diff --git a/lib/future/backports/http/cookiejar.py b/lib/future/backports/http/cookiejar.py
index 0ad80a02..a39242c0 100644
--- a/lib/future/backports/http/cookiejar.py
+++ b/lib/future/backports/http/cookiejar.py
@@ -1851,7 +1851,7 @@ def lwp_cookie_str(cookie):
 class LWPCookieJar(FileCookieJar):
     """
     The LWPCookieJar saves a sequence of "Set-Cookie3" lines.
-    "Set-Cookie3" is the format used by the libwww-perl libary, not known
+    "Set-Cookie3" is the format used by the libwww-perl library, not known
     to be compatible with any browser, but which is easy to read and
     doesn't lose information about RFC 2965 cookies.
 
diff --git a/lib/future/backports/test/support.py b/lib/future/backports/test/support.py
index 1999e208..6639372b 100644
--- a/lib/future/backports/test/support.py
+++ b/lib/future/backports/test/support.py
@@ -28,7 +28,6 @@ import importlib
 # import collections.abc    # not present on Py2.7
 import re
 import subprocess
-import imp
 import time
 try:
     import sysconfig
@@ -341,37 +340,6 @@ def rmtree(path):
         if error.errno != errno.ENOENT:
             raise
 
-def make_legacy_pyc(source):
-    """Move a PEP 3147 pyc/pyo file to its legacy pyc/pyo location.
-
-    The choice of .pyc or .pyo extension is done based on the __debug__ flag
-    value.
-
-    :param source: The file system path to the source file.  The source file
-        does not need to exist, however the PEP 3147 pyc file must exist.
-    :return: The file system path to the legacy pyc file.
-    """
-    pyc_file = imp.cache_from_source(source)
-    up_one = os.path.dirname(os.path.abspath(source))
-    legacy_pyc = os.path.join(up_one, source + ('c' if __debug__ else 'o'))
-    os.rename(pyc_file, legacy_pyc)
-    return legacy_pyc
-
-def forget(modname):
-    """'Forget' a module was ever imported.
-
-    This removes the module from sys.modules and deletes any PEP 3147 or
-    legacy .pyc and .pyo files.
-    """
-    unload(modname)
-    for dirname in sys.path:
-        source = os.path.join(dirname, modname + '.py')
-        # It doesn't matter if they exist or not, unlink all possible
-        # combinations of PEP 3147 and legacy pyc and pyo files.
-        unlink(source + 'c')
-        unlink(source + 'o')
-        unlink(imp.cache_from_source(source, debug_override=True))
-        unlink(imp.cache_from_source(source, debug_override=False))
 
 # On some platforms, should not run gui test even if it is allowed
 # in `use_resources'.
diff --git a/lib/future/backports/xmlrpc/client.py b/lib/future/backports/xmlrpc/client.py
index b78e5bad..0838f61a 100644
--- a/lib/future/backports/xmlrpc/client.py
+++ b/lib/future/backports/xmlrpc/client.py
@@ -134,10 +134,11 @@ from __future__ import (absolute_import, division, print_function,
 from future.builtins import bytes, dict, int, range, str
 
 import base64
-# Py2.7 compatibility hack
-base64.encodebytes = base64.encodestring
-base64.decodebytes = base64.decodestring
 import sys
+if sys.version_info < (3, 9):
+    # Py2.7 compatibility hack
+    base64.encodebytes = base64.encodestring
+    base64.decodebytes = base64.decodestring
 import time
 from datetime import datetime
 from future.backports.http import client as http_client
@@ -1251,7 +1252,7 @@ class Transport(object):
     # Send HTTP request.
     #
     # @param host Host descriptor (URL or (URL, x509 info) tuple).
-    # @param handler Targer RPC handler (a path relative to host)
+    # @param handler Target RPC handler (a path relative to host)
     # @param request_body The XML-RPC request body
     # @param debug Enable debugging if debug is true.
     # @return An HTTPConnection.
diff --git a/lib/future/builtins/__init__.py b/lib/future/builtins/__init__.py
index 8bc1649d..1734cd45 100644
--- a/lib/future/builtins/__init__.py
+++ b/lib/future/builtins/__init__.py
@@ -2,7 +2,7 @@
 A module that brings in equivalents of the new and modified Python 3
 builtins into Py2. Has no effect on Py3.
 
-See the docs `here <http://python-future.org/what-else.html>`_
+See the docs `here <https://python-future.org/what-else.html>`_
 (``docs/what-else.rst``) for more information.
 
 """
diff --git a/lib/future/moves/_dummy_thread.py b/lib/future/moves/_dummy_thread.py
index 688d249b..6633f42e 100644
--- a/lib/future/moves/_dummy_thread.py
+++ b/lib/future/moves/_dummy_thread.py
@@ -1,8 +1,13 @@
 from __future__ import absolute_import
-from future.utils import PY3
+from future.utils import PY3, PY39_PLUS
 
-if PY3:
-    from _dummy_thread import *
+
+if PY39_PLUS:
+    # _dummy_thread and dummy_threading modules were both deprecated in
+    # Python 3.7 and removed in Python 3.9
+    from _thread import *
+elif PY3:
+        from _dummy_thread import *
 else:
     __future_module__ = True
     from dummy_thread import *
diff --git a/lib/future/moves/multiprocessing.py b/lib/future/moves/multiprocessing.py
new file mode 100644
index 00000000..a871b676
--- /dev/null
+++ b/lib/future/moves/multiprocessing.py
@@ -0,0 +1,7 @@
+from __future__ import absolute_import
+from future.utils import PY3
+
+from multiprocessing import *
+if not PY3:
+    __future_module__ = True
+    from multiprocessing.queues import SimpleQueue
diff --git a/lib/future/moves/test/support.py b/lib/future/moves/test/support.py
index e9aa0f48..f70c9d7d 100644
--- a/lib/future/moves/test/support.py
+++ b/lib/future/moves/test/support.py
@@ -1,9 +1,18 @@
 from __future__ import absolute_import
+
+import sys
+
 from future.standard_library import suspend_hooks
 from future.utils import PY3
 
 if PY3:
     from test.support import *
+    if sys.version_info[:2] >= (3, 10):
+        from test.support.os_helper import (
+            EnvironmentVarGuard,
+            TESTFN,
+        )
+        from test.support.warnings_helper import check_warnings
 else:
     __future_module__ = True
     with suspend_hooks():
diff --git a/lib/future/standard_library/__init__.py b/lib/future/standard_library/__init__.py
index cff02f95..d467aaf4 100644
--- a/lib/future/standard_library/__init__.py
+++ b/lib/future/standard_library/__init__.py
@@ -17,7 +17,7 @@ And then these normal Py3 imports work on both Py3 and Py2::
     import socketserver
     import winreg    # on Windows only
     import test.support
-    import html, html.parser, html.entites
+    import html, html.parser, html.entities
     import http, http.client, http.server
     import http.cookies, http.cookiejar
     import urllib.parse, urllib.request, urllib.response, urllib.error, urllib.robotparser
@@ -33,6 +33,7 @@ And then these normal Py3 imports work on both Py3 and Py2::
     from collections import OrderedDict, Counter, ChainMap     # even on Py2.6
     from subprocess import getoutput, getstatusoutput
     from subprocess import check_output              # even on Py2.6
+    from multiprocessing import SimpleQueue
 
 (The renamed modules and functions are still available under their old
 names on Python 2.)
@@ -62,9 +63,12 @@ from __future__ import absolute_import, division, print_function
 
 import sys
 import logging
-import imp
+# imp was deprecated in python 3.6
+if sys.version_info >= (3, 6):
+    import importlib as imp
+else:
+    import imp
 import contextlib
-import types
 import copy
 import os
 
@@ -108,6 +112,7 @@ RENAMES = {
            'future.moves.socketserver': 'socketserver',
            'ConfigParser': 'configparser',
            'repr': 'reprlib',
+           'multiprocessing.queues': 'multiprocessing',
            # 'FileDialog': 'tkinter.filedialog',
            # 'tkFileDialog': 'tkinter.filedialog',
            # 'SimpleDialog': 'tkinter.simpledialog',
@@ -125,7 +130,7 @@ RENAMES = {
            # 'Tkinter': 'tkinter',
            '_winreg': 'winreg',
            'thread': '_thread',
-           'dummy_thread': '_dummy_thread',
+           'dummy_thread': '_dummy_thread' if sys.version_info < (3, 9) else '_thread',
            # 'anydbm': 'dbm',   # causes infinite import loop
            # 'whichdb': 'dbm',  # causes infinite import loop
            # anydbm and whichdb are handled by fix_imports2
@@ -184,6 +189,7 @@ MOVES = [('collections', 'UserList', 'UserList', 'UserList'),
          ('itertools', 'filterfalse','itertools', 'ifilterfalse'),
          ('itertools', 'zip_longest','itertools', 'izip_longest'),
          ('sys', 'intern','__builtin__', 'intern'),
+         ('multiprocessing', 'SimpleQueue', 'multiprocessing.queues', 'SimpleQueue'),
          # The re module has no ASCII flag in Py2, but this is the default.
          # Set re.ASCII to a zero constant. stat.ST_MODE just happens to be one
          # (and it exists on Py2.6+).
diff --git a/lib/future/types/newint.py b/lib/future/types/newint.py
index 04a411e9..ebc5715e 100644
--- a/lib/future/types/newint.py
+++ b/lib/future/types/newint.py
@@ -223,9 +223,11 @@ class newint(with_metaclass(BaseNewInt, long)):
 
     def __rpow__(self, other):
         value = super(newint, self).__rpow__(other)
-        if value is NotImplemented:
+        if isint(value):
+            return newint(value)
+        elif value is NotImplemented:
             return other ** long(self)
-        return newint(value)
+        return value
 
     def __lshift__(self, other):
         if not isint(other):
@@ -318,7 +320,7 @@ class newint(with_metaclass(BaseNewInt, long)):
             bits = length * 8
             num = (2**bits) + self
             if num <= 0:
-                raise OverflowError("int too smal to convert")
+                raise OverflowError("int too small to convert")
         else:
             if self < 0:
                 raise OverflowError("can't convert negative int to unsigned")
diff --git a/lib/future/types/newrange.py b/lib/future/types/newrange.py
index 6d4ebe2f..dc5eb802 100644
--- a/lib/future/types/newrange.py
+++ b/lib/future/types/newrange.py
@@ -105,7 +105,7 @@ class newrange(Sequence):
         raise ValueError('%r is not in range' % value)
 
     def count(self, value):
-        """Return the number of ocurrences of integer `value`
+        """Return the number of occurrences of integer `value`
         in the sequence this range represents."""
         # a value can occur exactly zero or one times
         return int(value in self)
diff --git a/lib/inflect/__init__.py b/lib/inflect/__init__.py
index b638c6b8..d0eded16 100644
--- a/lib/inflect/__init__.py
+++ b/lib/inflect/__init__.py
@@ -3,6 +3,8 @@ inflect: english language inflection
  - correctly generate plurals, ordinals, indefinite articles
  - convert numbers to words
 
+Copyright (C) 2010 Paul Dyson
+
 Based upon the Perl module
 `Lingua::EN::Inflect <https://metacpan.org/pod/Lingua::EN::Inflect>`_.
 
@@ -50,34 +52,33 @@ Exceptions:
 
 """
 
+from __future__ import annotations
+
 import ast
-import re
-import functools
 import collections
 import contextlib
+import functools
+import itertools
+import re
+from numbers import Number
 from typing import (
+    TYPE_CHECKING,
+    Any,
+    Callable,
     Dict,
-    Union,
-    Optional,
     Iterable,
     List,
     Match,
-    Tuple,
-    Callable,
+    Optional,
     Sequence,
+    Tuple,
+    Union,
     cast,
-    Any,
 )
-from typing_extensions import Literal
-from numbers import Number
 
-
-from pydantic import Field
-from typing_extensions import Annotated
-
-
-from .compat.pydantic1 import validate_call
-from .compat.pydantic import same_method
+from more_itertools import windowed_complete
+from typeguard import typechecked
+from typing_extensions import Annotated, Literal
 
 
 class UnknownClassicalModeError(Exception):
@@ -258,9 +259,9 @@ si_sb_irregular_compound = {v: k for (k, v) in pl_sb_irregular_compound.items()}
 for k in list(si_sb_irregular_compound):
     if "|" in k:
         k1, k2 = k.split("|")
-        si_sb_irregular_compound[k1] = si_sb_irregular_compound[
-            k2
-        ] = si_sb_irregular_compound[k]
+        si_sb_irregular_compound[k1] = si_sb_irregular_compound[k2] = (
+            si_sb_irregular_compound[k]
+        )
         del si_sb_irregular_compound[k]
 
 # si_sb_irregular_keys = enclose('|'.join(si_sb_irregular.keys()))
@@ -1597,7 +1598,7 @@ pl_prep_bysize = bysize(pl_prep_list_da)
 
 pl_prep = enclose("|".join(pl_prep_list_da))
 
-pl_sb_prep_dual_compound = fr"(.*?)((?:-|\s+)(?:{pl_prep})(?:-|\s+))a(?:-|\s+)(.*)"
+pl_sb_prep_dual_compound = rf"(.*?)((?:-|\s+)(?:{pl_prep})(?:-|\s+))a(?:-|\s+)(.*)"
 
 
 singular_pronoun_genders = {
@@ -1764,7 +1765,7 @@ plverb_ambiguous_pres = {
 }
 
 plverb_ambiguous_pres_keys = re.compile(
-    fr"^({enclose('|'.join(plverb_ambiguous_pres))})((\s.*)?)$", re.IGNORECASE
+    rf"^({enclose('|'.join(plverb_ambiguous_pres))})((\s.*)?)$", re.IGNORECASE
 )
 
 
@@ -1804,7 +1805,7 @@ pl_count_one = ("1", "a", "an", "one", "each", "every", "this", "that")
 pl_adj_special = {"a": "some", "an": "some", "this": "these", "that": "those"}
 
 pl_adj_special_keys = re.compile(
-    fr"^({enclose('|'.join(pl_adj_special))})$", re.IGNORECASE
+    rf"^({enclose('|'.join(pl_adj_special))})$", re.IGNORECASE
 )
 
 pl_adj_poss = {
@@ -1816,7 +1817,7 @@ pl_adj_poss = {
     "their": "their",
 }
 
-pl_adj_poss_keys = re.compile(fr"^({enclose('|'.join(pl_adj_poss))})$", re.IGNORECASE)
+pl_adj_poss_keys = re.compile(rf"^({enclose('|'.join(pl_adj_poss))})$", re.IGNORECASE)
 
 
 # 2. INDEFINITE ARTICLES
@@ -1883,7 +1884,7 @@ ordinal = dict(
     twelve="twelfth",
 )
 
-ordinal_suff = re.compile(fr"({'|'.join(ordinal)})\Z")
+ordinal_suff = re.compile(rf"({'|'.join(ordinal)})\Z")
 
 
 # NUMBERS
@@ -1948,13 +1949,13 @@ DOLLAR_DIGITS = re.compile(r"\$(\d+)")
 FUNCTION_CALL = re.compile(r"((\w+)\([^)]*\)*)", re.IGNORECASE)
 PARTITION_WORD = re.compile(r"\A(\s*)(.+?)(\s*)\Z")
 PL_SB_POSTFIX_ADJ_STEMS_RE = re.compile(
-    fr"^(?:{pl_sb_postfix_adj_stems})$", re.IGNORECASE
+    rf"^(?:{pl_sb_postfix_adj_stems})$", re.IGNORECASE
 )
 PL_SB_PREP_DUAL_COMPOUND_RE = re.compile(
-    fr"^(?:{pl_sb_prep_dual_compound})$", re.IGNORECASE
+    rf"^(?:{pl_sb_prep_dual_compound})$", re.IGNORECASE
 )
 DENOMINATOR = re.compile(r"(?P<denominator>.+)( (per|a) .+)")
-PLVERB_SPECIAL_S_RE = re.compile(fr"^({plverb_special_s})$")
+PLVERB_SPECIAL_S_RE = re.compile(rf"^({plverb_special_s})$")
 WHITESPACE = re.compile(r"\s")
 ENDS_WITH_S = re.compile(r"^(.*[^s])s$", re.IGNORECASE)
 ENDS_WITH_APOSTROPHE_S = re.compile(r"^(.*)'s?$")
@@ -2020,10 +2021,25 @@ class Words(str):
         self.last = self.split_[-1]
 
 
-Word = Annotated[str, Field(min_length=1)]
 Falsish = Any  # ideally, falsish would only validate on bool(value) is False
 
 
+_STATIC_TYPE_CHECKING = TYPE_CHECKING
+# ^-- Workaround for typeguard AST manipulation:
+#     https://github.com/agronholm/typeguard/issues/353#issuecomment-1556306554
+
+if _STATIC_TYPE_CHECKING:  # pragma: no cover
+    Word = Annotated[str, "String with at least 1 character"]
+else:
+
+    class _WordMeta(type):  # Too dynamic to be supported by mypy...
+        def __instancecheck__(self, instance: Any) -> bool:
+            return isinstance(instance, str) and len(instance) >= 1
+
+    class Word(metaclass=_WordMeta):  # type: ignore[no-redef]
+        """String with at least 1 character"""
+
+
 class engine:
     def __init__(self) -> None:
         self.classical_dict = def_classical.copy()
@@ -2045,7 +2061,7 @@ class engine:
     def _number_args(self, val):
         self.__number_args = val
 
-    @validate_call
+    @typechecked
     def defnoun(self, singular: Optional[Word], plural: Optional[Word]) -> int:
         """
         Set the noun plural of singular to plural.
@@ -2057,7 +2073,7 @@ class engine:
         self.si_sb_user_defined.extend((plural, singular))
         return 1
 
-    @validate_call
+    @typechecked
     def defverb(
         self,
         s1: Optional[Word],
@@ -2082,7 +2098,7 @@ class engine:
         self.pl_v_user_defined.extend((s1, p1, s2, p2, s3, p3))
         return 1
 
-    @validate_call
+    @typechecked
     def defadj(self, singular: Optional[Word], plural: Optional[Word]) -> int:
         """
         Set the adjective plural of singular to plural.
@@ -2093,7 +2109,7 @@ class engine:
         self.pl_adj_user_defined.extend((singular, plural))
         return 1
 
-    @validate_call
+    @typechecked
     def defa(self, pattern: Optional[Word]) -> int:
         """
         Define the indefinite article as 'a' for words matching pattern.
@@ -2103,7 +2119,7 @@ class engine:
         self.A_a_user_defined.extend((pattern, "a"))
         return 1
 
-    @validate_call
+    @typechecked
     def defan(self, pattern: Optional[Word]) -> int:
         """
         Define the indefinite article as 'an' for words matching pattern.
@@ -2121,8 +2137,8 @@ class engine:
             return
         try:
             re.match(pattern, "")
-        except re.error:
-            raise BadUserDefinedPatternError(pattern)
+        except re.error as err:
+            raise BadUserDefinedPatternError(pattern) from err
 
     def checkpatplural(self, pattern: Optional[Word]) -> None:
         """
@@ -2130,10 +2146,10 @@ class engine:
         """
         return
 
-    @validate_call
+    @typechecked
     def ud_match(self, word: Word, wordlist: Sequence[Optional[Word]]) -> Optional[str]:
         for i in range(len(wordlist) - 2, -2, -2):  # backwards through even elements
-            mo = re.search(fr"^{wordlist[i]}$", word, re.IGNORECASE)
+            mo = re.search(rf"^{wordlist[i]}$", word, re.IGNORECASE)
             if mo:
                 if wordlist[i + 1] is None:
                     return None
@@ -2191,8 +2207,8 @@ class engine:
         if count is not None:
             try:
                 self.persistent_count = int(count)
-            except ValueError:
-                raise BadNumValueError
+            except ValueError as err:
+                raise BadNumValueError from err
             if (show is None) or show:
                 return str(count)
         else:
@@ -2270,7 +2286,7 @@ class engine:
 
     # 0. PERFORM GENERAL INFLECTIONS IN A STRING
 
-    @validate_call
+    @typechecked
     def inflect(self, text: Word) -> str:
         """
         Perform inflections in a string.
@@ -2347,7 +2363,7 @@ class engine:
         else:
             return "", "", ""
 
-    @validate_call
+    @typechecked
     def plural(self, text: Word, count: Optional[Union[str, int, Any]] = None) -> str:
         """
         Return the plural of text.
@@ -2371,7 +2387,7 @@ class engine:
         )
         return f"{pre}{plural}{post}"
 
-    @validate_call
+    @typechecked
     def plural_noun(
         self, text: Word, count: Optional[Union[str, int, Any]] = None
     ) -> str:
@@ -2392,7 +2408,7 @@ class engine:
         plural = self.postprocess(word, self._plnoun(word, count))
         return f"{pre}{plural}{post}"
 
-    @validate_call
+    @typechecked
     def plural_verb(
         self, text: Word, count: Optional[Union[str, int, Any]] = None
     ) -> str:
@@ -2416,7 +2432,7 @@ class engine:
         )
         return f"{pre}{plural}{post}"
 
-    @validate_call
+    @typechecked
     def plural_adj(
         self, text: Word, count: Optional[Union[str, int, Any]] = None
     ) -> str:
@@ -2437,7 +2453,7 @@ class engine:
         plural = self.postprocess(word, self._pl_special_adjective(word, count) or word)
         return f"{pre}{plural}{post}"
 
-    @validate_call
+    @typechecked
     def compare(self, word1: Word, word2: Word) -> Union[str, bool]:
         """
         compare word1 and word2 for equality regardless of plurality
@@ -2460,15 +2476,13 @@ class engine:
         >>> compare('egg', '')
         Traceback (most recent call last):
         ...
-        pydantic...ValidationError: ...
-        ...
-          ...at least 1 characters...
+        typeguard.TypeCheckError:...is not an instance of inflect.Word
         """
         norms = self.plural_noun, self.plural_verb, self.plural_adj
         results = (self._plequal(word1, word2, norm) for norm in norms)
         return next(filter(None, results), False)
 
-    @validate_call
+    @typechecked
     def compare_nouns(self, word1: Word, word2: Word) -> Union[str, bool]:
         """
         compare word1 and word2 for equality regardless of plurality
@@ -2484,7 +2498,7 @@ class engine:
         """
         return self._plequal(word1, word2, self.plural_noun)
 
-    @validate_call
+    @typechecked
     def compare_verbs(self, word1: Word, word2: Word) -> Union[str, bool]:
         """
         compare word1 and word2 for equality regardless of plurality
@@ -2500,7 +2514,7 @@ class engine:
         """
         return self._plequal(word1, word2, self.plural_verb)
 
-    @validate_call
+    @typechecked
     def compare_adjs(self, word1: Word, word2: Word) -> Union[str, bool]:
         """
         compare word1 and word2 for equality regardless of plurality
@@ -2516,7 +2530,7 @@ class engine:
         """
         return self._plequal(word1, word2, self.plural_adj)
 
-    @validate_call
+    @typechecked
     def singular_noun(
         self,
         text: Word,
@@ -2574,18 +2588,18 @@ class engine:
             return "s:p"
         self.classical_dict = classval.copy()
 
-        if same_method(pl, self.plural) or same_method(pl, self.plural_noun):
+        if pl == self.plural or pl == self.plural_noun:
             if self._pl_check_plurals_N(word1, word2):
                 return "p:p"
             if self._pl_check_plurals_N(word2, word1):
                 return "p:p"
-        if same_method(pl, self.plural) or same_method(pl, self.plural_adj):
+        if pl == self.plural or pl == self.plural_adj:
             if self._pl_check_plurals_adj(word1, word2):
                 return "p:p"
         return False
 
     def _pl_reg_plurals(self, pair: str, stems: str, end1: str, end2: str) -> bool:
-        pattern = fr"({stems})({end1}\|\1{end2}|{end2}\|\1{end1})"
+        pattern = rf"({stems})({end1}\|\1{end2}|{end2}\|\1{end1})"
         return bool(re.search(pattern, pair))
 
     def _pl_check_plurals_N(self, word1: str, word2: str) -> bool:
@@ -2679,6 +2693,8 @@ class engine:
         word = Words(word)
 
         if word.last.lower() in pl_sb_uninflected_complete:
+            if len(word.split_) >= 3:
+                return self._handle_long_compounds(word, count=2) or word
             return word
 
         if word in pl_sb_uninflected_caps:
@@ -2707,13 +2723,9 @@ class engine:
                 )
 
         if len(word.split_) >= 3:
-            for numword in range(1, len(word.split_) - 1):
-                if word.split_[numword] in pl_prep_list_da:
-                    return " ".join(
-                        word.split_[: numword - 1]
-                        + [self._plnoun(word.split_[numword - 1], 2)]
-                        + word.split_[numword:]
-                    )
+            handled_words = self._handle_long_compounds(word, count=2)
+            if handled_words is not None:
+                return handled_words
 
         # only pluralize denominators in units
         mo = DENOMINATOR.search(word.lowered)
@@ -2972,6 +2984,30 @@ class engine:
             parts[: pivot - 1] + [sep.join([transformed, parts[pivot], ''])]
         ) + " ".join(parts[(pivot + 1) :])
 
+    def _handle_long_compounds(self, word: Words, count: int) -> Union[str, None]:
+        """
+        Handles the plural and singular for compound `Words` that
+        have three or more words, based on the given count.
+
+        >>> engine()._handle_long_compounds(Words("pair of scissors"), 2)
+        'pairs of scissors'
+        >>> engine()._handle_long_compounds(Words("men beyond hills"), 1)
+        'man beyond hills'
+        """
+        inflection = self._sinoun if count == 1 else self._plnoun
+        solutions = (  # type: ignore
+            " ".join(
+                itertools.chain(
+                    leader,
+                    [inflection(cand, count), prep],  # type: ignore
+                    trailer,
+                )
+            )
+            for leader, (cand, prep), trailer in windowed_complete(word.split_, 2)
+            if prep in pl_prep_list_da  # type: ignore
+        )
+        return next(solutions, None)
+
     @staticmethod
     def _find_pivot(words, candidates):
         pivots = (
@@ -2980,7 +3016,7 @@ class engine:
         try:
             return next(pivots)
         except StopIteration:
-            raise ValueError("No pivot found")
+            raise ValueError("No pivot found") from None
 
     def _pl_special_verb(  # noqa: C901
         self, word: str, count: Optional[Union[str, int]] = None
@@ -3145,8 +3181,8 @@ class engine:
                 gender = self.thegender
             elif gender not in singular_pronoun_genders:
                 raise BadGenderError
-        except (TypeError, IndexError):
-            raise BadGenderError
+        except (TypeError, IndexError) as err:
+            raise BadGenderError from err
 
         # HANDLE USER-DEFINED NOUNS
 
@@ -3165,6 +3201,8 @@ class engine:
         words = Words(word)
 
         if words.last.lower() in pl_sb_uninflected_complete:
+            if len(words.split_) >= 3:
+                return self._handle_long_compounds(words, count=1) or word
             return word
 
         if word in pl_sb_uninflected_caps:
@@ -3450,7 +3488,7 @@ class engine:
 
     # ADJECTIVES
 
-    @validate_call
+    @typechecked
     def a(self, text: Word, count: Optional[Union[int, str, Any]] = 1) -> str:
         """
         Return the appropriate indefinite article followed by text.
@@ -3531,7 +3569,7 @@ class engine:
 
     # 2. TRANSLATE ZERO-QUANTIFIED $word TO "no plural($word)"
 
-    @validate_call
+    @typechecked
     def no(self, text: Word, count: Optional[Union[int, str]] = None) -> str:
         """
         If count is 0, no, zero or nil, return 'no' followed by the plural
@@ -3569,7 +3607,7 @@ class engine:
 
     # PARTICIPLES
 
-    @validate_call
+    @typechecked
     def present_participle(self, word: Word) -> str:
         """
         Return the present participle for word.
@@ -3588,7 +3626,7 @@ class engine:
 
     # NUMERICAL INFLECTIONS
 
-    @validate_call(config=dict(arbitrary_types_allowed=True))
+    @typechecked
     def ordinal(self, num: Union[Number, Word]) -> str:
         """
         Return the ordinal of num.
@@ -3619,16 +3657,7 @@ class engine:
                 post = nth[n % 10]
             return f"{num}{post}"
         else:
-            # Mad props to Damian Conway (?) whose ordinal()
-            # algorithm is type-bendy enough to foil MyPy
-            str_num: str = num  # type: ignore[assignment]
-            mo = ordinal_suff.search(str_num)
-            if mo:
-                post = ordinal[mo.group(1)]
-                rval = ordinal_suff.sub(post, str_num)
-            else:
-                rval = f"{str_num}th"
-            return rval
+            return self._sub_ord(num)
 
     def millfn(self, ind: int = 0) -> str:
         if ind > len(mill) - 1:
@@ -3747,7 +3776,36 @@ class engine:
             num = ONE_DIGIT_WORD.sub(self.unitsub, num, 1)
         return num
 
-    @validate_call(config=dict(arbitrary_types_allowed=True))  # noqa: C901
+    @staticmethod
+    def _sub_ord(val):
+        new = ordinal_suff.sub(lambda match: ordinal[match.group(1)], val)
+        return new + "th" * (new == val)
+
+    @classmethod
+    def _chunk_num(cls, num, decimal, group):
+        if decimal:
+            max_split = -1 if group != 0 else 1
+            chunks = num.split(".", max_split)
+        else:
+            chunks = [num]
+        return cls._remove_last_blank(chunks)
+
+    @staticmethod
+    def _remove_last_blank(chunks):
+        """
+        Remove the last item from chunks if it's a blank string.
+
+        Return the resultant chunks and whether the last item was removed.
+        """
+        removed = chunks[-1] == ""
+        result = chunks[:-1] if removed else chunks
+        return result, removed
+
+    @staticmethod
+    def _get_sign(num):
+        return {'+': 'plus', '-': 'minus'}.get(num.lstrip()[0], '')
+
+    @typechecked
     def number_to_words(  # noqa: C901
         self,
         num: Union[Number, Word],
@@ -3794,13 +3852,8 @@ class engine:
 
         if group < 0 or group > 3:
             raise BadChunkingOptionError
-        nowhite = num.lstrip()
-        if nowhite[0] == "+":
-            sign = "plus"
-        elif nowhite[0] == "-":
-            sign = "minus"
-        else:
-            sign = ""
+
+        sign = self._get_sign(num)
 
         if num in nth_suff:
             num = zero
@@ -3808,34 +3861,21 @@ class engine:
         myord = num[-2:] in nth_suff
         if myord:
             num = num[:-2]
-        finalpoint = False
-        if decimal:
-            if group != 0:
-                chunks = num.split(".")
-            else:
-                chunks = num.split(".", 1)
-            if chunks[-1] == "":  # remove blank string if nothing after decimal
-                chunks = chunks[:-1]
-                finalpoint = True  # add 'point' to end of output
-        else:
-            chunks = [num]
 
-        first: Union[int, str, bool] = 1
-        loopstart = 0
+        chunks, finalpoint = self._chunk_num(num, decimal, group)
 
-        if chunks[0] == "":
-            first = 0
-            if len(chunks) > 1:
-                loopstart = 1
+        loopstart = chunks[0] == ""
+        first: bool | None = not loopstart
+
+        def _handle_chunk(chunk):
+            nonlocal first
 
-        for i in range(loopstart, len(chunks)):
-            chunk = chunks[i]
             # remove all non numeric \D
             chunk = NON_DIGIT.sub("", chunk)
             if chunk == "":
                 chunk = "0"
 
-            if group == 0 and (first == 0 or first == ""):
+            if group == 0 and not first:
                 chunk = self.enword(chunk, 1)
             else:
                 chunk = self.enword(chunk, group)
@@ -3850,20 +3890,17 @@ class engine:
             # chunk = re.sub(r"(\A\s|\s\Z)", self.blankfn, chunk)
             chunk = chunk.strip()
             if first:
-                first = ""
-            chunks[i] = chunk
+                first = None
+            return chunk
+
+        chunks[loopstart:] = map(_handle_chunk, chunks[loopstart:])
 
         numchunks = []
         if first != 0:
             numchunks = chunks[0].split(f"{comma} ")
 
         if myord and numchunks:
-            # TODO: can this be just one re as it is in perl?
-            mo = ordinal_suff.search(numchunks[-1])
-            if mo:
-                numchunks[-1] = ordinal_suff.sub(ordinal[mo.group(1)], numchunks[-1])
-            else:
-                numchunks[-1] += "th"
+            numchunks[-1] = self._sub_ord(numchunks[-1])
 
         for chunk in chunks[1:]:
             numchunks.append(decimal)
@@ -3872,34 +3909,30 @@ class engine:
         if finalpoint:
             numchunks.append(decimal)
 
-        # wantlist: Perl list context. can explicitly specify in Python
         if wantlist:
-            if sign:
-                numchunks = [sign] + numchunks
-            return numchunks
-        elif group:
-            signout = f"{sign} " if sign else ""
-            return f"{signout}{', '.join(numchunks)}"
-        else:
-            signout = f"{sign} " if sign else ""
-            num = f"{signout}{numchunks.pop(0)}"
-            if decimal is None:
-                first = True
-            else:
-                first = not num.endswith(decimal)
-            for nc in numchunks:
-                if nc == decimal:
-                    num += f" {nc}"
-                    first = 0
-                elif first:
-                    num += f"{comma} {nc}"
-                else:
-                    num += f" {nc}"
-            return num
+            return [sign] * bool(sign) + numchunks
 
-    # Join words with commas and a trailing 'and' (when appropriate)...
+        signout = f"{sign} " if sign else ""
+        valout = (
+            ', '.join(numchunks)
+            if group
+            else ''.join(self._render(numchunks, decimal, comma))
+        )
+        return signout + valout
 
-    @validate_call
+    @staticmethod
+    def _render(chunks, decimal, comma):
+        first_item = chunks.pop(0)
+        yield first_item
+        first = decimal is None or not first_item.endswith(decimal)
+        for nc in chunks:
+            if nc == decimal:
+                first = False
+            elif first:
+                yield comma
+            yield f" {nc}"
+
+    @typechecked
     def join(
         self,
         words: Optional[Sequence[Word]],
diff --git a/lib/inflect/compat/pydantic.py b/lib/inflect/compat/pydantic.py
deleted file mode 100644
index d777564a..00000000
--- a/lib/inflect/compat/pydantic.py
+++ /dev/null
@@ -1,19 +0,0 @@
-class ValidateCallWrapperWrapper:
-    def __init__(self, wrapped):
-        self.orig = wrapped
-
-    def __eq__(self, other):
-        return self.raw_function == other.raw_function
-
-    @property
-    def raw_function(self):
-        return getattr(self.orig, 'raw_function') or self.orig
-
-
-def same_method(m1, m2) -> bool:
-    """
-    Return whether m1 and m2 are the same method.
-
-    Workaround for pydantic/pydantic#6390.
-    """
-    return ValidateCallWrapperWrapper(m1) == ValidateCallWrapperWrapper(m2)
diff --git a/lib/inflect/compat/pydantic1.py b/lib/inflect/compat/pydantic1.py
deleted file mode 100644
index 8262fdcf..00000000
--- a/lib/inflect/compat/pydantic1.py
+++ /dev/null
@@ -1,8 +0,0 @@
-try:
-    from pydantic import validate_call  # type: ignore
-except ImportError:
-    # Pydantic 1
-    from pydantic import validate_arguments as validate_call  # type: ignore
-
-
-__all__ = ['validate_call']
diff --git a/lib/jaraco/classes/ancestry.py b/lib/jaraco/classes/ancestry.py
deleted file mode 100644
index dd9b2e92..00000000
--- a/lib/jaraco/classes/ancestry.py
+++ /dev/null
@@ -1,68 +0,0 @@
-"""
-Routines for obtaining the class names
-of an object and its parent classes.
-"""
-
-from more_itertools import unique_everseen
-
-
-def all_bases(c):
-    """
-    return a tuple of all base classes the class c has as a parent.
-    >>> object in all_bases(list)
-    True
-    """
-    return c.mro()[1:]
-
-
-def all_classes(c):
-    """
-    return a tuple of all classes to which c belongs
-    >>> list in all_classes(list)
-    True
-    """
-    return c.mro()
-
-
-# borrowed from
-# http://code.activestate.com/recipes/576949-find-all-subclasses-of-a-given-class/
-
-
-def iter_subclasses(cls):
-    """
-    Generator over all subclasses of a given class, in depth-first order.
-
-    >>> bool in list(iter_subclasses(int))
-    True
-    >>> class A(object): pass
-    >>> class B(A): pass
-    >>> class C(A): pass
-    >>> class D(B,C): pass
-    >>> class E(D): pass
-    >>>
-    >>> for cls in iter_subclasses(A):
-    ...     print(cls.__name__)
-    B
-    D
-    E
-    C
-    >>> # get ALL classes currently defined
-    >>> res = [cls.__name__ for cls in iter_subclasses(object)]
-    >>> 'type' in res
-    True
-    >>> 'tuple' in res
-    True
-    >>> len(res) > 100
-    True
-    """
-    return unique_everseen(_iter_all_subclasses(cls))
-
-
-def _iter_all_subclasses(cls):
-    try:
-        subs = cls.__subclasses__()
-    except TypeError:  # fails only when cls is type
-        subs = cls.__subclasses__(cls)
-    for sub in subs:
-        yield sub
-        yield from iter_subclasses(sub)
diff --git a/lib/jaraco/classes/meta.py b/lib/jaraco/classes/meta.py
deleted file mode 100644
index bd41a1d9..00000000
--- a/lib/jaraco/classes/meta.py
+++ /dev/null
@@ -1,66 +0,0 @@
-"""
-meta.py
-
-Some useful metaclasses.
-"""
-
-
-class LeafClassesMeta(type):
-    """
-    A metaclass for classes that keeps track of all of them that
-    aren't base classes.
-
-    >>> Parent = LeafClassesMeta('MyParentClass', (), {})
-    >>> Parent in Parent._leaf_classes
-    True
-    >>> Child = LeafClassesMeta('MyChildClass', (Parent,), {})
-    >>> Child in Parent._leaf_classes
-    True
-    >>> Parent in Parent._leaf_classes
-    False
-
-    >>> Other = LeafClassesMeta('OtherClass', (), {})
-    >>> Parent in Other._leaf_classes
-    False
-    >>> len(Other._leaf_classes)
-    1
-    """
-
-    def __init__(cls, name, bases, attrs):
-        if not hasattr(cls, '_leaf_classes'):
-            cls._leaf_classes = set()
-        leaf_classes = getattr(cls, '_leaf_classes')
-        leaf_classes.add(cls)
-        # remove any base classes
-        leaf_classes -= set(bases)
-
-
-class TagRegistered(type):
-    """
-    As classes of this metaclass are created, they keep a registry in the
-    base class of all classes by a class attribute, indicated by attr_name.
-
-    >>> FooObject = TagRegistered('FooObject', (), dict(tag='foo'))
-    >>> FooObject._registry['foo'] is FooObject
-    True
-    >>> BarObject = TagRegistered('Barobject', (FooObject,), dict(tag='bar'))
-    >>> FooObject._registry is BarObject._registry
-    True
-    >>> len(FooObject._registry)
-    2
-
-    '...' below should be 'jaraco.classes' but for pytest-dev/pytest#3396
-    >>> FooObject._registry['bar']
-    <class '....meta.Barobject'>
-    """
-
-    attr_name = 'tag'
-
-    def __init__(cls, name, bases, namespace):
-        super(TagRegistered, cls).__init__(name, bases, namespace)
-        if not hasattr(cls, '_registry'):
-            cls._registry = {}
-        meta = cls.__class__
-        attr = getattr(cls, meta.attr_name, None)
-        if attr:
-            cls._registry[attr] = cls
diff --git a/lib/jaraco/classes/properties.py b/lib/jaraco/classes/properties.py
deleted file mode 100644
index 62f9e200..00000000
--- a/lib/jaraco/classes/properties.py
+++ /dev/null
@@ -1,170 +0,0 @@
-class NonDataProperty:
-    """Much like the property builtin, but only implements __get__,
-    making it a non-data property, and can be subsequently reset.
-
-    See http://users.rcn.com/python/download/Descriptor.htm for more
-    information.
-
-    >>> class X(object):
-    ...   @NonDataProperty
-    ...   def foo(self):
-    ...     return 3
-    >>> x = X()
-    >>> x.foo
-    3
-    >>> x.foo = 4
-    >>> x.foo
-    4
-
-    '...' below should be 'jaraco.classes' but for pytest-dev/pytest#3396
-    >>> X.foo
-    <....properties.NonDataProperty object at ...>
-    """
-
-    def __init__(self, fget):
-        assert fget is not None, "fget cannot be none"
-        assert callable(fget), "fget must be callable"
-        self.fget = fget
-
-    def __get__(self, obj, objtype=None):
-        if obj is None:
-            return self
-        return self.fget(obj)
-
-
-class classproperty:
-    """
-    Like @property but applies at the class level.
-
-
-    >>> class X(metaclass=classproperty.Meta):
-    ...   val = None
-    ...   @classproperty
-    ...   def foo(cls):
-    ...     return cls.val
-    ...   @foo.setter
-    ...   def foo(cls, val):
-    ...     cls.val = val
-    >>> X.foo
-    >>> X.foo = 3
-    >>> X.foo
-    3
-    >>> x = X()
-    >>> x.foo
-    3
-    >>> X.foo = 4
-    >>> x.foo
-    4
-
-    Setting the property on an instance affects the class.
-
-    >>> x.foo = 5
-    >>> x.foo
-    5
-    >>> X.foo
-    5
-    >>> vars(x)
-    {}
-    >>> X().foo
-    5
-
-    Attempting to set an attribute where no setter was defined
-    results in an AttributeError:
-
-    >>> class GetOnly(metaclass=classproperty.Meta):
-    ...   @classproperty
-    ...   def foo(cls):
-    ...     return 'bar'
-    >>> GetOnly.foo = 3
-    Traceback (most recent call last):
-    ...
-    AttributeError: can't set attribute
-
-    It is also possible to wrap a classmethod or staticmethod in
-    a classproperty.
-
-    >>> class Static(metaclass=classproperty.Meta):
-    ...   @classproperty
-    ...   @classmethod
-    ...   def foo(cls):
-    ...     return 'foo'
-    ...   @classproperty
-    ...   @staticmethod
-    ...   def bar():
-    ...     return 'bar'
-    >>> Static.foo
-    'foo'
-    >>> Static.bar
-    'bar'
-
-    *Legacy*
-
-    For compatibility, if the metaclass isn't specified, the
-    legacy behavior will be invoked.
-
-    >>> class X:
-    ...   val = None
-    ...   @classproperty
-    ...   def foo(cls):
-    ...     return cls.val
-    ...   @foo.setter
-    ...   def foo(cls, val):
-    ...     cls.val = val
-    >>> X.foo
-    >>> X.foo = 3
-    >>> X.foo
-    3
-    >>> x = X()
-    >>> x.foo
-    3
-    >>> X.foo = 4
-    >>> x.foo
-    4
-
-    Note, because the metaclass was not specified, setting
-    a value on an instance does not have the intended effect.
-
-    >>> x.foo = 5
-    >>> x.foo
-    5
-    >>> X.foo  # should be 5
-    4
-    >>> vars(x)  # should be empty
-    {'foo': 5}
-    >>> X().foo  # should be 5
-    4
-    """
-
-    class Meta(type):
-        def __setattr__(self, key, value):
-            obj = self.__dict__.get(key, None)
-            if type(obj) is classproperty:
-                return obj.__set__(self, value)
-            return super().__setattr__(key, value)
-
-    def __init__(self, fget, fset=None):
-        self.fget = self._ensure_method(fget)
-        self.fset = fset
-        fset and self.setter(fset)
-
-    def __get__(self, instance, owner=None):
-        return self.fget.__get__(None, owner)()
-
-    def __set__(self, owner, value):
-        if not self.fset:
-            raise AttributeError("can't set attribute")
-        if type(owner) is not classproperty.Meta:
-            owner = type(owner)
-        return self.fset.__get__(None, owner)(value)
-
-    def setter(self, fset):
-        self.fset = self._ensure_method(fset)
-        return self
-
-    @classmethod
-    def _ensure_method(cls, fn):
-        """
-        Ensure fn is a classmethod or staticmethod.
-        """
-        needs_method = not isinstance(fn, (classmethod, staticmethod))
-        return classmethod(fn) if needs_method else fn
diff --git a/lib/jaraco/collections/__init__.py b/lib/jaraco/collections/__init__.py
index abedf002..5c276da9 100644
--- a/lib/jaraco/collections/__init__.py
+++ b/lib/jaraco/collections/__init__.py
@@ -1,16 +1,17 @@
-import re
-import operator
+from __future__ import annotations
+
 import collections.abc
-import itertools
 import copy
 import functools
+import itertools
+import operator
 import random
+import re
 from collections.abc import Container, Iterable, Mapping
-from typing import Callable, Union
+from typing import Any, Callable, Union
 
 import jaraco.text
 
-
 _Matchable = Union[Callable, Container, Iterable, re.Pattern]
 
 
@@ -199,7 +200,12 @@ class RangeMap(dict):
 
     """
 
-    def __init__(self, source, sort_params={}, key_match_comparator=operator.le):
+    def __init__(
+        self,
+        source,
+        sort_params: Mapping[str, Any] = {},
+        key_match_comparator=operator.le,
+    ):
         dict.__init__(self, source)
         self.sort_params = sort_params
         self.match = key_match_comparator
@@ -291,7 +297,7 @@ class KeyTransformingDict(dict):
         return key
 
     def __init__(self, *args, **kargs):
-        super(KeyTransformingDict, self).__init__()
+        super().__init__()
         # build a dictionary using the default constructs
         d = dict(*args, **kargs)
         # build this dictionary using transformed keys.
@@ -300,31 +306,31 @@ class KeyTransformingDict(dict):
 
     def __setitem__(self, key, val):
         key = self.transform_key(key)
-        super(KeyTransformingDict, self).__setitem__(key, val)
+        super().__setitem__(key, val)
 
     def __getitem__(self, key):
         key = self.transform_key(key)
-        return super(KeyTransformingDict, self).__getitem__(key)
+        return super().__getitem__(key)
 
     def __contains__(self, key):
         key = self.transform_key(key)
-        return super(KeyTransformingDict, self).__contains__(key)
+        return super().__contains__(key)
 
     def __delitem__(self, key):
         key = self.transform_key(key)
-        return super(KeyTransformingDict, self).__delitem__(key)
+        return super().__delitem__(key)
 
     def get(self, key, *args, **kwargs):
         key = self.transform_key(key)
-        return super(KeyTransformingDict, self).get(key, *args, **kwargs)
+        return super().get(key, *args, **kwargs)
 
     def setdefault(self, key, *args, **kwargs):
         key = self.transform_key(key)
-        return super(KeyTransformingDict, self).setdefault(key, *args, **kwargs)
+        return super().setdefault(key, *args, **kwargs)
 
     def pop(self, key, *args, **kwargs):
         key = self.transform_key(key)
-        return super(KeyTransformingDict, self).pop(key, *args, **kwargs)
+        return super().pop(key, *args, **kwargs)
 
     def matching_key_for(self, key):
         """
@@ -333,8 +339,8 @@ class KeyTransformingDict(dict):
         """
         try:
             return next(e_key for e_key in self.keys() if e_key == key)
-        except StopIteration:
-            raise KeyError(key)
+        except StopIteration as err:
+            raise KeyError(key) from err
 
 
 class FoldedCaseKeyedDict(KeyTransformingDict):
@@ -483,7 +489,7 @@ class ItemsAsAttributes:
 
     def __getattr__(self, key):
         try:
-            return getattr(super(ItemsAsAttributes, self), key)
+            return getattr(super(), key)
         except AttributeError as e:
             # attempt to get the value from the mapping (return self[key])
             #  but be careful not to lose the original exception context.
@@ -677,7 +683,7 @@ class BijectiveMap(dict):
     """
 
     def __init__(self, *args, **kwargs):
-        super(BijectiveMap, self).__init__()
+        super().__init__()
         self.update(*args, **kwargs)
 
     def __setitem__(self, item, value):
@@ -691,19 +697,19 @@ class BijectiveMap(dict):
         )
         if overlap:
             raise ValueError("Key/Value pairs may not overlap")
-        super(BijectiveMap, self).__setitem__(item, value)
-        super(BijectiveMap, self).__setitem__(value, item)
+        super().__setitem__(item, value)
+        super().__setitem__(value, item)
 
     def __delitem__(self, item):
         self.pop(item)
 
     def __len__(self):
-        return super(BijectiveMap, self).__len__() // 2
+        return super().__len__() // 2
 
     def pop(self, key, *args, **kwargs):
         mirror = self[key]
-        super(BijectiveMap, self).__delitem__(mirror)
-        return super(BijectiveMap, self).pop(key, *args, **kwargs)
+        super().__delitem__(mirror)
+        return super().pop(key, *args, **kwargs)
 
     def update(self, *args, **kwargs):
         # build a dictionary using the default constructs
@@ -769,7 +775,7 @@ class FrozenDict(collections.abc.Mapping, collections.abc.Hashable):
     __slots__ = ['__data']
 
     def __new__(cls, *args, **kwargs):
-        self = super(FrozenDict, cls).__new__(cls)
+        self = super().__new__(cls)
         self.__data = dict(*args, **kwargs)
         return self
 
@@ -844,7 +850,7 @@ class Enumeration(ItemsAsAttributes, BijectiveMap):
             names = names.split()
         if codes is None:
             codes = itertools.count()
-        super(Enumeration, self).__init__(zip(names, codes))
+        super().__init__(zip(names, codes))
 
     @property
     def names(self):
diff --git a/lib/jaraco/context.py b/lib/jaraco/context.py
index b0d1ef37..61b27135 100644
--- a/lib/jaraco/context.py
+++ b/lib/jaraco/context.py
@@ -1,15 +1,26 @@
-import os
-import subprocess
+from __future__ import annotations
+
 import contextlib
 import functools
-import tempfile
-import shutil
 import operator
+import os
+import shutil
+import subprocess
+import sys
+import tempfile
+import urllib.request
 import warnings
+from typing import Iterator
+
+
+if sys.version_info < (3, 12):
+    from backports import tarfile
+else:
+    import tarfile
 
 
 @contextlib.contextmanager
-def pushd(dir):
+def pushd(dir: str | os.PathLike) -> Iterator[str | os.PathLike]:
     """
     >>> tmp_path = getfixture('tmp_path')
     >>> with pushd(tmp_path):
@@ -26,33 +37,88 @@ def pushd(dir):
 
 
 @contextlib.contextmanager
-def tarball_context(url, target_dir=None, runner=None, pushd=pushd):
+def tarball(
+    url, target_dir: str | os.PathLike | None = None
+) -> Iterator[str | os.PathLike]:
     """
-    Get a tarball, extract it, change to that directory, yield, then
-    clean up.
-    `runner` is the function to invoke commands.
-    `pushd` is a context manager for changing the directory.
+    Get a tarball, extract it, yield, then clean up.
+
+    >>> import urllib.request
+    >>> url = getfixture('tarfile_served')
+    >>> target = getfixture('tmp_path') / 'out'
+    >>> tb = tarball(url, target_dir=target)
+    >>> import pathlib
+    >>> with tb as extracted:
+    ...     contents = pathlib.Path(extracted, 'contents.txt').read_text(encoding='utf-8')
+    >>> assert not os.path.exists(extracted)
     """
     if target_dir is None:
         target_dir = os.path.basename(url).replace('.tar.gz', '').replace('.tgz', '')
-    if runner is None:
-        runner = functools.partial(subprocess.check_call, shell=True)
-    else:
-        warnings.warn("runner parameter is deprecated", DeprecationWarning)
     # In the tar command, use --strip-components=1 to strip the first path and
     #  then
     #  use -C to cause the files to be extracted to {target_dir}. This ensures
     #  that we always know where the files were extracted.
-    runner('mkdir {target_dir}'.format(**vars()))
+    os.mkdir(target_dir)
     try:
-        getter = 'wget {url} -O -'
-        extract = 'tar x{compression} --strip-components=1 -C {target_dir}'
-        cmd = ' | '.join((getter, extract))
-        runner(cmd.format(compression=infer_compression(url), **vars()))
-        with pushd(target_dir):
-            yield target_dir
+        req = urllib.request.urlopen(url)
+        with tarfile.open(fileobj=req, mode='r|*') as tf:
+            tf.extractall(path=target_dir, filter=strip_first_component)
+        yield target_dir
     finally:
-        runner('rm -Rf {target_dir}'.format(**vars()))
+        shutil.rmtree(target_dir)
+
+
+def strip_first_component(
+    member: tarfile.TarInfo,
+    path,
+) -> tarfile.TarInfo:
+    _, member.name = member.name.split('/', 1)
+    return member
+
+
+def _compose(*cmgrs):
+    """
+    Compose any number of dependent context managers into a single one.
+
+    The last, innermost context manager may take arbitrary arguments, but
+    each successive context manager should accept the result from the
+    previous as a single parameter.
+
+    Like :func:`jaraco.functools.compose`, behavior works from right to
+    left, so the context manager should be indicated from outermost to
+    innermost.
+
+    Example, to create a context manager to change to a temporary
+    directory:
+
+    >>> temp_dir_as_cwd = _compose(pushd, temp_dir)
+    >>> with temp_dir_as_cwd() as dir:
+    ...     assert os.path.samefile(os.getcwd(), dir)
+    """
+
+    def compose_two(inner, outer):
+        def composed(*args, **kwargs):
+            with inner(*args, **kwargs) as saved, outer(saved) as res:
+                yield res
+
+        return contextlib.contextmanager(composed)
+
+    return functools.reduce(compose_two, reversed(cmgrs))
+
+
+tarball_cwd = _compose(pushd, tarball)
+
+
+@contextlib.contextmanager
+def tarball_context(*args, **kwargs):
+    warnings.warn(
+        "tarball_context is deprecated. Use tarball or tarball_cwd instead.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    pushd_ctx = kwargs.pop('pushd', pushd)
+    with tarball(*args, **kwargs) as tball, pushd_ctx(tball) as dir:
+        yield dir
 
 
 def infer_compression(url):
@@ -68,6 +134,11 @@ def infer_compression(url):
     >>> infer_compression('file.xz')
     'J'
     """
+    warnings.warn(
+        "infer_compression is deprecated with no replacement",
+        DeprecationWarning,
+        stacklevel=2,
+    )
     # cheat and just assume it's the last two characters
     compression_indicator = url[-2:]
     mapping = dict(gz='z', bz='j', xz='J')
@@ -84,7 +155,7 @@ def temp_dir(remover=shutil.rmtree):
     >>> import pathlib
     >>> with temp_dir() as the_dir:
     ...     assert os.path.isdir(the_dir)
-    ...     _ = pathlib.Path(the_dir).joinpath('somefile').write_text('contents')
+    ...     _ = pathlib.Path(the_dir).joinpath('somefile').write_text('contents', encoding='utf-8')
     >>> assert not os.path.exists(the_dir)
     """
     temp_dir = tempfile.mkdtemp()
@@ -113,15 +184,23 @@ def repo_context(url, branch=None, quiet=True, dest_ctx=temp_dir):
         yield repo_dir
 
 
-@contextlib.contextmanager
 def null():
     """
     A null context suitable to stand in for a meaningful context.
 
     >>> with null() as value:
     ...     assert value is None
+
+    This context is most useful when dealing with two or more code
+    branches but only some need a context. Wrap the others in a null
+    context to provide symmetry across all options.
     """
-    yield
+    warnings.warn(
+        "null is deprecated. Use contextlib.nullcontext",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    return contextlib.nullcontext()
 
 
 class ExceptionTrap:
@@ -267,13 +346,7 @@ class on_interrupt(contextlib.ContextDecorator):
     ...     on_interrupt('ignore')(do_interrupt)()
     """
 
-    def __init__(
-        self,
-        action='error',
-        # py3.7 compat
-        # /,
-        code=1,
-    ):
+    def __init__(self, action='error', /, code=1):
         self.action = action
         self.code = code
 
diff --git a/lib/jaraco/functools/__init__.pyi b/lib/jaraco/functools/__init__.pyi
index c2b9ab17..19191bf9 100644
--- a/lib/jaraco/functools/__init__.pyi
+++ b/lib/jaraco/functools/__init__.pyi
@@ -74,9 +74,6 @@ def result_invoke(
 def invoke(
     f: Callable[_P, _R], /, *args: _P.args, **kwargs: _P.kwargs
 ) -> Callable[_P, _R]: ...
-def call_aside(
-    f: Callable[_P, _R], *args: _P.args, **kwargs: _P.kwargs
-) -> Callable[_P, _R]: ...
 
 class Throttler(Generic[_R]):
     last_called: float
diff --git a/lib/libfuturize/fixer_util.py b/lib/libfuturize/fixer_util.py
index 48e4689d..b5c123f6 100644
--- a/lib/libfuturize/fixer_util.py
+++ b/lib/libfuturize/fixer_util.py
@@ -9,11 +9,11 @@ python-modernize licence: BSD (from python-modernize/LICENSE)
 """
 
 from lib2to3.fixer_util import (FromImport, Newline, is_import,
-                                find_root, does_tree_import, Comma)
+                                find_root, does_tree_import,
+                                Call, Name, Comma)
 from lib2to3.pytree import Leaf, Node
-from lib2to3.pygram import python_symbols as syms, python_grammar
+from lib2to3.pygram import python_symbols as syms
 from lib2to3.pygram import token
-from lib2to3.fixer_util import (Node, Call, Name, syms, Comma, Number)
 import re
 
 
@@ -116,7 +116,7 @@ def suitify(parent):
     """
     for node in parent.children:
         if node.type == syms.suite:
-            # already in the prefered format, do nothing
+            # already in the preferred format, do nothing
             return
 
     # One-liners have no suite node, we have to fake one up
@@ -390,6 +390,7 @@ def touch_import_top(package, name_to_import, node):
                 break
         insert_pos = idx
 
+    children_hooks = []
     if package is None:
         import_ = Node(syms.import_name, [
             Leaf(token.NAME, u"import"),
@@ -413,8 +414,6 @@ def touch_import_top(package, name_to_import, node):
                                  ]
                                 )
             children_hooks = [install_hooks, Newline()]
-        else:
-            children_hooks = []
 
         # FromImport(package, [Leaf(token.NAME, name_to_import, prefix=u" ")])
 
@@ -448,7 +447,6 @@ def check_future_import(node):
     else:
         node = node.children[3]
     # now node is the import_as_name[s]
-    # print(python_grammar.number2symbol[node.type])  # breaks sometimes
     if node.type == syms.import_as_names:
         result = set()
         for n in node.children:
diff --git a/lib/libfuturize/fixes/fix_metaclass.py b/lib/libfuturize/fixes/fix_metaclass.py
index 2ac41c97..a7eee40d 100644
--- a/lib/libfuturize/fixes/fix_metaclass.py
+++ b/lib/libfuturize/fixes/fix_metaclass.py
@@ -37,7 +37,7 @@ from lib2to3.fixer_util import Name, syms, Node, Leaf, touch_import, Call, \
 
 def has_metaclass(parent):
     """ we have to check the cls_node without changing it.
-        There are two possiblities:
+        There are two possibilities:
           1)  clsdef => suite => simple_stmt => expr_stmt => Leaf('__meta')
           2)  clsdef => simple_stmt => expr_stmt => Leaf('__meta')
     """
@@ -63,7 +63,7 @@ def fixup_parse_tree(cls_node):
             # already in the preferred format, do nothing
             return
 
-    # !%@#! oneliners have no suite node, we have to fake one up
+    # !%@#! one-liners have no suite node, we have to fake one up
     for i, node in enumerate(cls_node.children):
         if node.type == token.COLON:
             break
diff --git a/lib/libpasteurize/fixes/fix_imports.py b/lib/libpasteurize/fixes/fix_imports.py
index 2d6718f1..b18ecf3d 100644
--- a/lib/libpasteurize/fixes/fix_imports.py
+++ b/lib/libpasteurize/fixes/fix_imports.py
@@ -16,6 +16,7 @@ MAPPING = {u"reprlib": u"repr",
            u"winreg": u"_winreg",
            u"configparser": u"ConfigParser",
            u"copyreg": u"copy_reg",
+           u"multiprocessing.SimpleQueue": u"multiprocessing.queues.SimpleQueue",
            u"queue": u"Queue",
            u"socketserver": u"SocketServer",
            u"_markupbase": u"markupbase",
diff --git a/lib/libpasteurize/fixes/fix_unpacking.py b/lib/libpasteurize/fixes/fix_unpacking.py
index c2d3207a..6e839e6b 100644
--- a/lib/libpasteurize/fixes/fix_unpacking.py
+++ b/lib/libpasteurize/fixes/fix_unpacking.py
@@ -18,8 +18,12 @@ def assignment_source(num_pre, num_post, LISTNAME, ITERNAME):
     Returns a source fit for Assign() from fixer_util
     """
     children = []
-    pre = unicode(num_pre)
-    post = unicode(num_post)
+    try:
+        pre = unicode(num_pre)
+        post = unicode(num_post)
+    except NameError:
+        pre = str(num_pre)
+        post = str(num_post)
     # This code builds the assignment source from lib2to3 tree primitives.
     # It's not very readable, but it seems like the most correct way to do it.
     if num_pre > 0:
diff --git a/lib/past/__init__.py b/lib/past/__init__.py
index 14713039..54619e0a 100644
--- a/lib/past/__init__.py
+++ b/lib/past/__init__.py
@@ -75,12 +75,12 @@ Credits
 -------
 
 :Author:  Ed Schofield, Jordan M. Adler, et al
-:Sponsor: Python Charmers Pty Ltd, Australia: http://pythoncharmers.com
+:Sponsor: Python Charmers: https://pythoncharmers.com
 
 
 Licensing
 ---------
-Copyright 2013-2019 Python Charmers Pty Ltd, Australia.
+Copyright 2013-2024 Python Charmers, Australia.
 The software is distributed under an MIT licence. See LICENSE.txt.
 """
 
diff --git a/lib/past/builtins/misc.py b/lib/past/builtins/misc.py
index 3600695c..0b8e6a98 100644
--- a/lib/past/builtins/misc.py
+++ b/lib/past/builtins/misc.py
@@ -1,11 +1,13 @@
 from __future__ import unicode_literals
 
 import inspect
+import sys
 import math
 import numbers
 
 from future.utils import PY2, PY3, exec_
 
+
 if PY2:
     from collections import Mapping
 else:
@@ -103,13 +105,12 @@ if PY3:
         return '0' + builtins.oct(number)[2:]
 
     raw_input = input
-
-    try:
+    # imp was deprecated in python 3.6
+    if sys.version_info >= (3, 6):
         from importlib import reload
-    except ImportError:
+    else:
         # for python2, python3 <= 3.4
         from imp import reload
-
     unicode = str
     unichr = chr
     xrange = range
diff --git a/lib/past/translation/__init__.py b/lib/past/translation/__init__.py
index 7c678866..ae6c0d90 100644
--- a/lib/past/translation/__init__.py
+++ b/lib/past/translation/__init__.py
@@ -32,17 +32,31 @@ Author: Ed Schofield.
 Inspired by and based on ``uprefix`` by Vinay M. Sajip.
 """
 
-import imp
-import logging
-import marshal
-import os
 import sys
+# imp was deprecated in python 3.6
+if sys.version_info >= (3, 6):
+    import importlib as imp
+else:
+    import imp
+import logging
+import os
 import copy
 from lib2to3.pgen2.parse import ParseError
 from lib2to3.refactor import RefactoringTool
 
 from libfuturize import fixes
 
+try:
+    from importlib.machinery import (
+        PathFinder,
+        SourceFileLoader,
+    )
+except ImportError:
+    PathFinder = None
+    SourceFileLoader = object
+
+if sys.version_info[:2] < (3, 4):
+    import imp
 
 logger = logging.getLogger(__name__)
 logger.setLevel(logging.DEBUG)
@@ -225,6 +239,81 @@ def detect_python2(source, pathname):
         return False
 
 
+def transform(source, pathname):
+    # This implementation uses lib2to3,
+    # you can override and use something else
+    # if that's better for you
+
+    # lib2to3 likes a newline at the end
+    RTs.setup()
+    source += '\n'
+    try:
+        tree = RTs._rt.refactor_string(source, pathname)
+    except ParseError as e:
+        if e.msg != 'bad input' or e.value != '=':
+            raise
+        tree = RTs._rtp.refactor_string(source, pathname)
+    # could optimise a bit for only doing str(tree) if
+    # getattr(tree, 'was_changed', False) returns True
+    return str(tree)[:-1]  # remove added newline
+
+
+class PastSourceFileLoader(SourceFileLoader):
+    exclude_paths = []
+    include_paths = []
+
+    def _convert_needed(self):
+        fullname = self.name
+        if any(fullname.startswith(path) for path in self.exclude_paths):
+            convert = False
+        elif any(fullname.startswith(path) for path in self.include_paths):
+            convert = True
+        else:
+            convert = False
+        return convert
+
+    def _exec_transformed_module(self, module):
+        source = self.get_source(self.name)
+        pathname = self.path
+        if detect_python2(source, pathname):
+            source = transform(source, pathname)
+        code = compile(source, pathname, "exec")
+        exec(code, module.__dict__)
+
+    # For Python 3.3
+    def load_module(self, fullname):
+        logger.debug("Running load_module for %s", fullname)
+        if fullname in sys.modules:
+            mod = sys.modules[fullname]
+        else:
+            if self._convert_needed():
+                logger.debug("Autoconverting %s", fullname)
+                mod = imp.new_module(fullname)
+                sys.modules[fullname] = mod
+
+                # required by PEP 302
+                mod.__file__ = self.path
+                mod.__loader__ = self
+                if self.is_package(fullname):
+                    mod.__path__ = []
+                    mod.__package__ = fullname
+                else:
+                    mod.__package__ = fullname.rpartition('.')[0]
+                self._exec_transformed_module(mod)
+            else:
+                mod = super().load_module(fullname)
+        return mod
+
+    # For Python >=3.4
+    def exec_module(self, module):
+        logger.debug("Running exec_module for %s", module)
+        if self._convert_needed():
+            logger.debug("Autoconverting %s", self.name)
+            self._exec_transformed_module(module)
+        else:
+            super().exec_module(module)
+
+
 class Py2Fixer(object):
     """
     An import hook class that uses lib2to3 for source-to-source translation of
@@ -258,151 +347,30 @@ class Py2Fixer(object):
         """
         self.exclude_paths += paths
 
+    # For Python 3.3
     def find_module(self, fullname, path=None):
-        logger.debug('Running find_module: {0}...'.format(fullname))
-        if '.' in fullname:
-            parent, child = fullname.rsplit('.', 1)
-            if path is None:
-                loader = self.find_module(parent, path)
-                mod = loader.load_module(parent)
-                path = mod.__path__
-            fullname = child
-
-        # Perhaps we should try using the new importlib functionality in Python
-        # 3.3: something like this?
-        # thing = importlib.machinery.PathFinder.find_module(fullname, path)
-        try:
-            self.found = imp.find_module(fullname, path)
-        except Exception as e:
-            logger.debug('Py2Fixer could not find {0}')
-            logger.debug('Exception was: {0})'.format(fullname, e))
+        logger.debug("Running find_module: (%s, %s)", fullname, path)
+        loader = PathFinder.find_module(fullname, path)
+        if not loader:
+            logger.debug("Py2Fixer could not find %s", fullname)
             return None
-        self.kind = self.found[-1][-1]
-        if self.kind == imp.PKG_DIRECTORY:
-            self.pathname = os.path.join(self.found[1], '__init__.py')
-        elif self.kind == imp.PY_SOURCE:
-            self.pathname = self.found[1]
-        return self
+        loader.__class__ = PastSourceFileLoader
+        loader.exclude_paths = self.exclude_paths
+        loader.include_paths = self.include_paths
+        return loader
 
-    def transform(self, source):
-        # This implementation uses lib2to3,
-        # you can override and use something else
-        # if that's better for you
+    # For Python >=3.4
+    def find_spec(self, fullname, path=None, target=None):
+        logger.debug("Running find_spec: (%s, %s, %s)", fullname, path, target)
+        spec = PathFinder.find_spec(fullname, path, target)
+        if not spec:
+            logger.debug("Py2Fixer could not find %s", fullname)
+            return None
+        spec.loader.__class__ = PastSourceFileLoader
+        spec.loader.exclude_paths = self.exclude_paths
+        spec.loader.include_paths = self.include_paths
+        return spec
 
-        # lib2to3 likes a newline at the end
-        RTs.setup()
-        source += '\n'
-        try:
-            tree = RTs._rt.refactor_string(source, self.pathname)
-        except ParseError as e:
-            if e.msg != 'bad input' or e.value != '=':
-                raise
-            tree = RTs._rtp.refactor_string(source, self.pathname)
-        # could optimise a bit for only doing str(tree) if
-        # getattr(tree, 'was_changed', False) returns True
-        return str(tree)[:-1] # remove added newline
-
-    def load_module(self, fullname):
-        logger.debug('Running load_module for {0}...'.format(fullname))
-        if fullname in sys.modules:
-            mod = sys.modules[fullname]
-        else:
-            if self.kind in (imp.PY_COMPILED, imp.C_EXTENSION, imp.C_BUILTIN,
-                             imp.PY_FROZEN):
-                convert = False
-            # elif (self.pathname.startswith(_stdlibprefix)
-            #       and 'site-packages' not in self.pathname):
-            #     # We assume it's a stdlib package in this case. Is this too brittle?
-            #     # Please file a bug report at https://github.com/PythonCharmers/python-future
-            #     # if so.
-            #     convert = False
-            # in theory, other paths could be configured to be excluded here too
-            elif any([fullname.startswith(path) for path in self.exclude_paths]):
-                convert = False
-            elif any([fullname.startswith(path) for path in self.include_paths]):
-                convert = True
-            else:
-                convert = False
-            if not convert:
-                logger.debug('Excluded {0} from translation'.format(fullname))
-                mod = imp.load_module(fullname, *self.found)
-            else:
-                logger.debug('Autoconverting {0} ...'.format(fullname))
-                mod = imp.new_module(fullname)
-                sys.modules[fullname] = mod
-
-                # required by PEP 302
-                mod.__file__ = self.pathname
-                mod.__name__ = fullname
-                mod.__loader__ = self
-
-                # This:
-                #     mod.__package__ = '.'.join(fullname.split('.')[:-1])
-                # seems to result in "SystemError: Parent module '' not loaded,
-                # cannot perform relative import" for a package's __init__.py
-                # file. We use the approach below. Another option to try is the
-                # minimal load_module pattern from the PEP 302 text instead.
-
-                # Is the test in the next line more or less robust than the
-                # following one? Presumably less ...
-                # ispkg = self.pathname.endswith('__init__.py')
-
-                if self.kind == imp.PKG_DIRECTORY:
-                    mod.__path__ = [ os.path.dirname(self.pathname) ]
-                    mod.__package__ = fullname
-                else:
-                    #else, regular module
-                    mod.__path__ = []
-                    mod.__package__ = fullname.rpartition('.')[0]
-
-                try:
-                    cachename = imp.cache_from_source(self.pathname)
-                    if not os.path.exists(cachename):
-                        update_cache = True
-                    else:
-                        sourcetime = os.stat(self.pathname).st_mtime
-                        cachetime = os.stat(cachename).st_mtime
-                        update_cache = cachetime < sourcetime
-                    # # Force update_cache to work around a problem with it being treated as Py3 code???
-                    # update_cache = True
-                    if not update_cache:
-                        with open(cachename, 'rb') as f:
-                            data = f.read()
-                            try:
-                                code = marshal.loads(data)
-                            except Exception:
-                                # pyc could be corrupt. Regenerate it
-                                update_cache = True
-                    if update_cache:
-                        if self.found[0]:
-                            source = self.found[0].read()
-                        elif self.kind == imp.PKG_DIRECTORY:
-                            with open(self.pathname) as f:
-                                source = f.read()
-
-                        if detect_python2(source, self.pathname):
-                            source = self.transform(source)
-
-                        code = compile(source, self.pathname, 'exec')
-
-                        dirname = os.path.dirname(cachename)
-                        try:
-                            if not os.path.exists(dirname):
-                                os.makedirs(dirname)
-                            with open(cachename, 'wb') as f:
-                                data = marshal.dumps(code)
-                                f.write(data)
-                        except Exception:   # could be write-protected
-                            pass
-                    exec(code, mod.__dict__)
-                except Exception as e:
-                    # must remove module from sys.modules
-                    del sys.modules[fullname]
-                    raise # keep it simple
-
-        if self.found[0]:
-            self.found[0].close()
-        return mod
 
 _hook = Py2Fixer()
 
diff --git a/lib/typeguard/__init__.py b/lib/typeguard/__init__.py
new file mode 100644
index 00000000..6781cad0
--- /dev/null
+++ b/lib/typeguard/__init__.py
@@ -0,0 +1,48 @@
+import os
+from typing import Any
+
+from ._checkers import TypeCheckerCallable as TypeCheckerCallable
+from ._checkers import TypeCheckLookupCallback as TypeCheckLookupCallback
+from ._checkers import check_type_internal as check_type_internal
+from ._checkers import checker_lookup_functions as checker_lookup_functions
+from ._checkers import load_plugins as load_plugins
+from ._config import CollectionCheckStrategy as CollectionCheckStrategy
+from ._config import ForwardRefPolicy as ForwardRefPolicy
+from ._config import TypeCheckConfiguration as TypeCheckConfiguration
+from ._decorators import typechecked as typechecked
+from ._decorators import typeguard_ignore as typeguard_ignore
+from ._exceptions import InstrumentationWarning as InstrumentationWarning
+from ._exceptions import TypeCheckError as TypeCheckError
+from ._exceptions import TypeCheckWarning as TypeCheckWarning
+from ._exceptions import TypeHintWarning as TypeHintWarning
+from ._functions import TypeCheckFailCallback as TypeCheckFailCallback
+from ._functions import check_type as check_type
+from ._functions import warn_on_error as warn_on_error
+from ._importhook import ImportHookManager as ImportHookManager
+from ._importhook import TypeguardFinder as TypeguardFinder
+from ._importhook import install_import_hook as install_import_hook
+from ._memo import TypeCheckMemo as TypeCheckMemo
+from ._suppression import suppress_type_checks as suppress_type_checks
+from ._utils import Unset as Unset
+
+# Re-export imports so they look like they live directly in this package
+for value in list(locals().values()):
+    if getattr(value, "__module__", "").startswith(f"{__name__}."):
+        value.__module__ = __name__
+
+
+config: TypeCheckConfiguration
+
+
+def __getattr__(name: str) -> Any:
+    if name == "config":
+        from ._config import global_config
+
+        return global_config
+
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
+
+
+# Automatically load checker lookup functions unless explicitly disabled
+if "TYPEGUARD_DISABLE_PLUGIN_AUTOLOAD" not in os.environ:
+    load_plugins()
diff --git a/lib/typeguard/_checkers.py b/lib/typeguard/_checkers.py
new file mode 100644
index 00000000..2f8de6f3
--- /dev/null
+++ b/lib/typeguard/_checkers.py
@@ -0,0 +1,910 @@
+from __future__ import annotations
+
+import collections.abc
+import inspect
+import sys
+import types
+import typing
+import warnings
+from enum import Enum
+from inspect import Parameter, isclass, isfunction
+from io import BufferedIOBase, IOBase, RawIOBase, TextIOBase
+from textwrap import indent
+from typing import (
+    IO,
+    AbstractSet,
+    Any,
+    BinaryIO,
+    Callable,
+    Dict,
+    ForwardRef,
+    List,
+    Mapping,
+    MutableMapping,
+    NewType,
+    Optional,
+    Sequence,
+    Set,
+    TextIO,
+    Tuple,
+    Type,
+    TypeVar,
+    Union,
+)
+from unittest.mock import Mock
+
+try:
+    import typing_extensions
+except ImportError:
+    typing_extensions = None  # type: ignore[assignment]
+
+from ._config import ForwardRefPolicy
+from ._exceptions import TypeCheckError, TypeHintWarning
+from ._memo import TypeCheckMemo
+from ._utils import evaluate_forwardref, get_stacklevel, get_type_name, qualified_name
+
+if sys.version_info >= (3, 13):
+    from typing import is_typeddict
+else:
+    from typing_extensions import is_typeddict
+
+if sys.version_info >= (3, 11):
+    from typing import (
+        Annotated,
+        NotRequired,
+        TypeAlias,
+        get_args,
+        get_origin,
+    )
+
+    SubclassableAny = Any
+else:
+    from typing_extensions import (
+        Annotated,
+        NotRequired,
+        TypeAlias,
+        get_args,
+        get_origin,
+    )
+    from typing_extensions import Any as SubclassableAny
+
+if sys.version_info >= (3, 10):
+    from importlib.metadata import entry_points
+    from typing import ParamSpec
+else:
+    from importlib_metadata import entry_points
+    from typing_extensions import ParamSpec
+
+TypeCheckerCallable: TypeAlias = Callable[
+    [Any, Any, Tuple[Any, ...], TypeCheckMemo], Any
+]
+TypeCheckLookupCallback: TypeAlias = Callable[
+    [Any, Tuple[Any, ...], Tuple[Any, ...]], Optional[TypeCheckerCallable]
+]
+
+checker_lookup_functions: list[TypeCheckLookupCallback] = []
+generic_alias_types: tuple[type, ...] = (type(List), type(List[Any]))
+if sys.version_info >= (3, 9):
+    generic_alias_types += (types.GenericAlias,)
+
+
+# Sentinel
+_missing = object()
+
+# Lifted from mypy.sharedparse
+BINARY_MAGIC_METHODS = {
+    "__add__",
+    "__and__",
+    "__cmp__",
+    "__divmod__",
+    "__div__",
+    "__eq__",
+    "__floordiv__",
+    "__ge__",
+    "__gt__",
+    "__iadd__",
+    "__iand__",
+    "__idiv__",
+    "__ifloordiv__",
+    "__ilshift__",
+    "__imatmul__",
+    "__imod__",
+    "__imul__",
+    "__ior__",
+    "__ipow__",
+    "__irshift__",
+    "__isub__",
+    "__itruediv__",
+    "__ixor__",
+    "__le__",
+    "__lshift__",
+    "__lt__",
+    "__matmul__",
+    "__mod__",
+    "__mul__",
+    "__ne__",
+    "__or__",
+    "__pow__",
+    "__radd__",
+    "__rand__",
+    "__rdiv__",
+    "__rfloordiv__",
+    "__rlshift__",
+    "__rmatmul__",
+    "__rmod__",
+    "__rmul__",
+    "__ror__",
+    "__rpow__",
+    "__rrshift__",
+    "__rshift__",
+    "__rsub__",
+    "__rtruediv__",
+    "__rxor__",
+    "__sub__",
+    "__truediv__",
+    "__xor__",
+}
+
+
+def check_callable(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    if not callable(value):
+        raise TypeCheckError("is not callable")
+
+    if args:
+        try:
+            signature = inspect.signature(value)
+        except (TypeError, ValueError):
+            return
+
+        argument_types = args[0]
+        if isinstance(argument_types, list) and not any(
+            type(item) is ParamSpec for item in argument_types
+        ):
+            # The callable must not have keyword-only arguments without defaults
+            unfulfilled_kwonlyargs = [
+                param.name
+                for param in signature.parameters.values()
+                if param.kind == Parameter.KEYWORD_ONLY
+                and param.default == Parameter.empty
+            ]
+            if unfulfilled_kwonlyargs:
+                raise TypeCheckError(
+                    f"has mandatory keyword-only arguments in its declaration: "
+                    f'{", ".join(unfulfilled_kwonlyargs)}'
+                )
+
+            num_positional_args = num_mandatory_pos_args = 0
+            has_varargs = False
+            for param in signature.parameters.values():
+                if param.kind in (
+                    Parameter.POSITIONAL_ONLY,
+                    Parameter.POSITIONAL_OR_KEYWORD,
+                ):
+                    num_positional_args += 1
+                    if param.default is Parameter.empty:
+                        num_mandatory_pos_args += 1
+                elif param.kind == Parameter.VAR_POSITIONAL:
+                    has_varargs = True
+
+            if num_mandatory_pos_args > len(argument_types):
+                raise TypeCheckError(
+                    f"has too many mandatory positional arguments in its declaration; "
+                    f"expected {len(argument_types)} but {num_mandatory_pos_args} "
+                    f"mandatory positional argument(s) declared"
+                )
+            elif not has_varargs and num_positional_args < len(argument_types):
+                raise TypeCheckError(
+                    f"has too few arguments in its declaration; expected "
+                    f"{len(argument_types)} but {num_positional_args} argument(s) "
+                    f"declared"
+                )
+
+
+def check_mapping(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    if origin_type is Dict or origin_type is dict:
+        if not isinstance(value, dict):
+            raise TypeCheckError("is not a dict")
+    if origin_type is MutableMapping or origin_type is collections.abc.MutableMapping:
+        if not isinstance(value, collections.abc.MutableMapping):
+            raise TypeCheckError("is not a mutable mapping")
+    elif not isinstance(value, collections.abc.Mapping):
+        raise TypeCheckError("is not a mapping")
+
+    if args:
+        key_type, value_type = args
+        if key_type is not Any or value_type is not Any:
+            samples = memo.config.collection_check_strategy.iterate_samples(
+                value.items()
+            )
+            for k, v in samples:
+                try:
+                    check_type_internal(k, key_type, memo)
+                except TypeCheckError as exc:
+                    exc.append_path_element(f"key {k!r}")
+                    raise
+
+                try:
+                    check_type_internal(v, value_type, memo)
+                except TypeCheckError as exc:
+                    exc.append_path_element(f"value of key {k!r}")
+                    raise
+
+
+def check_typed_dict(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    if not isinstance(value, dict):
+        raise TypeCheckError("is not a dict")
+
+    declared_keys = frozenset(origin_type.__annotations__)
+    if hasattr(origin_type, "__required_keys__"):
+        required_keys = set(origin_type.__required_keys__)
+    else:  # py3.8 and lower
+        required_keys = set(declared_keys) if origin_type.__total__ else set()
+
+    existing_keys = set(value)
+    extra_keys = existing_keys - declared_keys
+    if extra_keys:
+        keys_formatted = ", ".join(f'"{key}"' for key in sorted(extra_keys, key=repr))
+        raise TypeCheckError(f"has unexpected extra key(s): {keys_formatted}")
+
+    # Detect NotRequired fields which are hidden by get_type_hints()
+    type_hints: dict[str, type] = {}
+    for key, annotation in origin_type.__annotations__.items():
+        if isinstance(annotation, ForwardRef):
+            annotation = evaluate_forwardref(annotation, memo)
+            if get_origin(annotation) is NotRequired:
+                required_keys.discard(key)
+                annotation = get_args(annotation)[0]
+
+        type_hints[key] = annotation
+
+    missing_keys = required_keys - existing_keys
+    if missing_keys:
+        keys_formatted = ", ".join(f'"{key}"' for key in sorted(missing_keys, key=repr))
+        raise TypeCheckError(f"is missing required key(s): {keys_formatted}")
+
+    for key, argtype in type_hints.items():
+        argvalue = value.get(key, _missing)
+        if argvalue is not _missing:
+            try:
+                check_type_internal(argvalue, argtype, memo)
+            except TypeCheckError as exc:
+                exc.append_path_element(f"value of key {key!r}")
+                raise
+
+
+def check_list(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    if not isinstance(value, list):
+        raise TypeCheckError("is not a list")
+
+    if args and args != (Any,):
+        samples = memo.config.collection_check_strategy.iterate_samples(value)
+        for i, v in enumerate(samples):
+            try:
+                check_type_internal(v, args[0], memo)
+            except TypeCheckError as exc:
+                exc.append_path_element(f"item {i}")
+                raise
+
+
+def check_sequence(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    if not isinstance(value, collections.abc.Sequence):
+        raise TypeCheckError("is not a sequence")
+
+    if args and args != (Any,):
+        samples = memo.config.collection_check_strategy.iterate_samples(value)
+        for i, v in enumerate(samples):
+            try:
+                check_type_internal(v, args[0], memo)
+            except TypeCheckError as exc:
+                exc.append_path_element(f"item {i}")
+                raise
+
+
+def check_set(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    if origin_type is frozenset:
+        if not isinstance(value, frozenset):
+            raise TypeCheckError("is not a frozenset")
+    elif not isinstance(value, AbstractSet):
+        raise TypeCheckError("is not a set")
+
+    if args and args != (Any,):
+        samples = memo.config.collection_check_strategy.iterate_samples(value)
+        for v in samples:
+            try:
+                check_type_internal(v, args[0], memo)
+            except TypeCheckError as exc:
+                exc.append_path_element(f"[{v}]")
+                raise
+
+
+def check_tuple(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    # Specialized check for NamedTuples
+    if field_types := getattr(origin_type, "__annotations__", None):
+        if not isinstance(value, origin_type):
+            raise TypeCheckError(
+                f"is not a named tuple of type {qualified_name(origin_type)}"
+            )
+
+        for name, field_type in field_types.items():
+            try:
+                check_type_internal(getattr(value, name), field_type, memo)
+            except TypeCheckError as exc:
+                exc.append_path_element(f"attribute {name!r}")
+                raise
+
+        return
+    elif not isinstance(value, tuple):
+        raise TypeCheckError("is not a tuple")
+
+    if args:
+        use_ellipsis = args[-1] is Ellipsis
+        tuple_params = args[: -1 if use_ellipsis else None]
+    else:
+        # Unparametrized Tuple or plain tuple
+        return
+
+    if use_ellipsis:
+        element_type = tuple_params[0]
+        samples = memo.config.collection_check_strategy.iterate_samples(value)
+        for i, element in enumerate(samples):
+            try:
+                check_type_internal(element, element_type, memo)
+            except TypeCheckError as exc:
+                exc.append_path_element(f"item {i}")
+                raise
+    elif tuple_params == ((),):
+        if value != ():
+            raise TypeCheckError("is not an empty tuple")
+    else:
+        if len(value) != len(tuple_params):
+            raise TypeCheckError(
+                f"has wrong number of elements (expected {len(tuple_params)}, got "
+                f"{len(value)} instead)"
+            )
+
+        for i, (element, element_type) in enumerate(zip(value, tuple_params)):
+            try:
+                check_type_internal(element, element_type, memo)
+            except TypeCheckError as exc:
+                exc.append_path_element(f"item {i}")
+                raise
+
+
+def check_union(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    errors: dict[str, TypeCheckError] = {}
+    try:
+        for type_ in args:
+            try:
+                check_type_internal(value, type_, memo)
+                return
+            except TypeCheckError as exc:
+                errors[get_type_name(type_)] = exc
+
+        formatted_errors = indent(
+            "\n".join(f"{key}: {error}" for key, error in errors.items()), "  "
+        )
+    finally:
+        del errors  # avoid creating ref cycle
+    raise TypeCheckError(f"did not match any element in the union:\n{formatted_errors}")
+
+
+def check_uniontype(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    errors: dict[str, TypeCheckError] = {}
+    for type_ in args:
+        try:
+            check_type_internal(value, type_, memo)
+            return
+        except TypeCheckError as exc:
+            errors[get_type_name(type_)] = exc
+
+    formatted_errors = indent(
+        "\n".join(f"{key}: {error}" for key, error in errors.items()), "  "
+    )
+    raise TypeCheckError(f"did not match any element in the union:\n{formatted_errors}")
+
+
+def check_class(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    if not isclass(value) and not isinstance(value, generic_alias_types):
+        raise TypeCheckError("is not a class")
+
+    if not args:
+        return
+
+    if isinstance(args[0], ForwardRef):
+        expected_class = evaluate_forwardref(args[0], memo)
+    else:
+        expected_class = args[0]
+
+    if expected_class is Any:
+        return
+    elif getattr(expected_class, "_is_protocol", False):
+        check_protocol(value, expected_class, (), memo)
+    elif isinstance(expected_class, TypeVar):
+        check_typevar(value, expected_class, (), memo, subclass_check=True)
+    elif get_origin(expected_class) is Union:
+        errors: dict[str, TypeCheckError] = {}
+        for arg in get_args(expected_class):
+            if arg is Any:
+                return
+
+            try:
+                check_class(value, type, (arg,), memo)
+                return
+            except TypeCheckError as exc:
+                errors[get_type_name(arg)] = exc
+        else:
+            formatted_errors = indent(
+                "\n".join(f"{key}: {error}" for key, error in errors.items()), "  "
+            )
+            raise TypeCheckError(
+                f"did not match any element in the union:\n{formatted_errors}"
+            )
+    elif not issubclass(value, expected_class):  # type: ignore[arg-type]
+        raise TypeCheckError(f"is not a subclass of {qualified_name(expected_class)}")
+
+
+def check_newtype(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    check_type_internal(value, origin_type.__supertype__, memo)
+
+
+def check_instance(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    if not isinstance(value, origin_type):
+        raise TypeCheckError(f"is not an instance of {qualified_name(origin_type)}")
+
+
+def check_typevar(
+    value: Any,
+    origin_type: TypeVar,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+    *,
+    subclass_check: bool = False,
+) -> None:
+    if origin_type.__bound__ is not None:
+        annotation = (
+            Type[origin_type.__bound__] if subclass_check else origin_type.__bound__
+        )
+        check_type_internal(value, annotation, memo)
+    elif origin_type.__constraints__:
+        for constraint in origin_type.__constraints__:
+            annotation = Type[constraint] if subclass_check else constraint
+            try:
+                check_type_internal(value, annotation, memo)
+            except TypeCheckError:
+                pass
+            else:
+                break
+        else:
+            formatted_constraints = ", ".join(
+                get_type_name(constraint) for constraint in origin_type.__constraints__
+            )
+            raise TypeCheckError(
+                f"does not match any of the constraints " f"({formatted_constraints})"
+            )
+
+
+if typing_extensions is None:
+
+    def _is_literal_type(typ: object) -> bool:
+        return typ is typing.Literal
+
+else:
+
+    def _is_literal_type(typ: object) -> bool:
+        return typ is typing.Literal or typ is typing_extensions.Literal
+
+
+def check_literal(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    def get_literal_args(literal_args: tuple[Any, ...]) -> tuple[Any, ...]:
+        retval: list[Any] = []
+        for arg in literal_args:
+            if _is_literal_type(get_origin(arg)):
+                retval.extend(get_literal_args(arg.__args__))
+            elif arg is None or isinstance(arg, (int, str, bytes, bool, Enum)):
+                retval.append(arg)
+            else:
+                raise TypeError(
+                    f"Illegal literal value: {arg}"
+                )  # TypeError here is deliberate
+
+        return tuple(retval)
+
+    final_args = tuple(get_literal_args(args))
+    try:
+        index = final_args.index(value)
+    except ValueError:
+        pass
+    else:
+        if type(final_args[index]) is type(value):
+            return
+
+    formatted_args = ", ".join(repr(arg) for arg in final_args)
+    raise TypeCheckError(f"is not any of ({formatted_args})") from None
+
+
+def check_literal_string(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    check_type_internal(value, str, memo)
+
+
+def check_typeguard(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    check_type_internal(value, bool, memo)
+
+
+def check_none(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    if value is not None:
+        raise TypeCheckError("is not None")
+
+
+def check_number(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    if origin_type is complex and not isinstance(value, (complex, float, int)):
+        raise TypeCheckError("is neither complex, float or int")
+    elif origin_type is float and not isinstance(value, (float, int)):
+        raise TypeCheckError("is neither float or int")
+
+
+def check_io(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    if origin_type is TextIO or (origin_type is IO and args == (str,)):
+        if not isinstance(value, TextIOBase):
+            raise TypeCheckError("is not a text based I/O object")
+    elif origin_type is BinaryIO or (origin_type is IO and args == (bytes,)):
+        if not isinstance(value, (RawIOBase, BufferedIOBase)):
+            raise TypeCheckError("is not a binary I/O object")
+    elif not isinstance(value, IOBase):
+        raise TypeCheckError("is not an I/O object")
+
+
+def check_protocol(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    # TODO: implement proper compatibility checking and support non-runtime protocols
+    if getattr(origin_type, "_is_runtime_protocol", False):
+        if not isinstance(value, origin_type):
+            raise TypeCheckError(
+                f"is not compatible with the {origin_type.__qualname__} protocol"
+            )
+    else:
+        warnings.warn(
+            f"Typeguard cannot check the {origin_type.__qualname__} protocol because "
+            f"it is a non-runtime protocol. If you would like to type check this "
+            f"protocol, please use @typing.runtime_checkable",
+            stacklevel=get_stacklevel(),
+        )
+
+
+def check_byteslike(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    if not isinstance(value, (bytearray, bytes, memoryview)):
+        raise TypeCheckError("is not bytes-like")
+
+
+def check_self(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    if memo.self_type is None:
+        raise TypeCheckError("cannot be checked against Self outside of a method call")
+
+    if isclass(value):
+        if not issubclass(value, memo.self_type):
+            raise TypeCheckError(
+                f"is not an instance of the self type "
+                f"({qualified_name(memo.self_type)})"
+            )
+    elif not isinstance(value, memo.self_type):
+        raise TypeCheckError(
+            f"is not an instance of the self type ({qualified_name(memo.self_type)})"
+        )
+
+
+def check_paramspec(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    pass  # No-op for now
+
+
+def check_instanceof(
+    value: Any,
+    origin_type: Any,
+    args: tuple[Any, ...],
+    memo: TypeCheckMemo,
+) -> None:
+    if not isinstance(value, origin_type):
+        raise TypeCheckError(f"is not an instance of {qualified_name(origin_type)}")
+
+
+def check_type_internal(
+    value: Any,
+    annotation: Any,
+    memo: TypeCheckMemo,
+) -> None:
+    """
+    Check that the given object is compatible with the given type annotation.
+
+    This function should only be used by type checker callables. Applications should use
+    :func:`~.check_type` instead.
+
+    :param value: the value to check
+    :param annotation: the type annotation to check against
+    :param memo: a memo object containing configuration and information necessary for
+        looking up forward references
+    """
+
+    if isinstance(annotation, ForwardRef):
+        try:
+            annotation = evaluate_forwardref(annotation, memo)
+        except NameError:
+            if memo.config.forward_ref_policy is ForwardRefPolicy.ERROR:
+                raise
+            elif memo.config.forward_ref_policy is ForwardRefPolicy.WARN:
+                warnings.warn(
+                    f"Cannot resolve forward reference {annotation.__forward_arg__!r}",
+                    TypeHintWarning,
+                    stacklevel=get_stacklevel(),
+                )
+
+            return
+
+    if annotation is Any or annotation is SubclassableAny or isinstance(value, Mock):
+        return
+
+    # Skip type checks if value is an instance of a class that inherits from Any
+    if not isclass(value) and SubclassableAny in type(value).__bases__:
+        return
+
+    extras: tuple[Any, ...]
+    origin_type = get_origin(annotation)
+    if origin_type is Annotated:
+        annotation, *extras_ = get_args(annotation)
+        extras = tuple(extras_)
+        origin_type = get_origin(annotation)
+    else:
+        extras = ()
+
+    if origin_type is not None:
+        args = get_args(annotation)
+
+        # Compatibility hack to distinguish between unparametrized and empty tuple
+        # (tuple[()]), necessary due to https://github.com/python/cpython/issues/91137
+        if origin_type in (tuple, Tuple) and annotation is not Tuple and not args:
+            args = ((),)
+    else:
+        origin_type = annotation
+        args = ()
+
+    for lookup_func in checker_lookup_functions:
+        checker = lookup_func(origin_type, args, extras)
+        if checker:
+            checker(value, origin_type, args, memo)
+            return
+
+    if isclass(origin_type):
+        if not isinstance(value, origin_type):
+            raise TypeCheckError(f"is not an instance of {qualified_name(origin_type)}")
+    elif type(origin_type) is str:  # noqa: E721
+        warnings.warn(
+            f"Skipping type check against {origin_type!r}; this looks like a "
+            f"string-form forward reference imported from another module",
+            TypeHintWarning,
+            stacklevel=get_stacklevel(),
+        )
+
+
+# Equality checks are applied to these
+origin_type_checkers = {
+    bytes: check_byteslike,
+    AbstractSet: check_set,
+    BinaryIO: check_io,
+    Callable: check_callable,
+    collections.abc.Callable: check_callable,
+    complex: check_number,
+    dict: check_mapping,
+    Dict: check_mapping,
+    float: check_number,
+    frozenset: check_set,
+    IO: check_io,
+    list: check_list,
+    List: check_list,
+    typing.Literal: check_literal,
+    Mapping: check_mapping,
+    MutableMapping: check_mapping,
+    None: check_none,
+    collections.abc.Mapping: check_mapping,
+    collections.abc.MutableMapping: check_mapping,
+    Sequence: check_sequence,
+    collections.abc.Sequence: check_sequence,
+    collections.abc.Set: check_set,
+    set: check_set,
+    Set: check_set,
+    TextIO: check_io,
+    tuple: check_tuple,
+    Tuple: check_tuple,
+    type: check_class,
+    Type: check_class,
+    Union: check_union,
+}
+if sys.version_info >= (3, 10):
+    origin_type_checkers[types.UnionType] = check_uniontype
+    origin_type_checkers[typing.TypeGuard] = check_typeguard
+if sys.version_info >= (3, 11):
+    origin_type_checkers.update(
+        {typing.LiteralString: check_literal_string, typing.Self: check_self}
+    )
+if typing_extensions is not None:
+    # On some Python versions, these may simply be re-exports from typing,
+    # but exactly which Python versions is subject to change,
+    # so it's best to err on the safe side
+    # and update the dictionary on all Python versions
+    # if typing_extensions is installed
+    origin_type_checkers[typing_extensions.Literal] = check_literal
+    origin_type_checkers[typing_extensions.LiteralString] = check_literal_string
+    origin_type_checkers[typing_extensions.Self] = check_self
+    origin_type_checkers[typing_extensions.TypeGuard] = check_typeguard
+
+
+def builtin_checker_lookup(
+    origin_type: Any, args: tuple[Any, ...], extras: tuple[Any, ...]
+) -> TypeCheckerCallable | None:
+    checker = origin_type_checkers.get(origin_type)
+    if checker is not None:
+        return checker
+    elif is_typeddict(origin_type):
+        return check_typed_dict
+    elif isclass(origin_type) and issubclass(
+        origin_type, Tuple  # type: ignore[arg-type]
+    ):
+        # NamedTuple
+        return check_tuple
+    elif getattr(origin_type, "_is_protocol", False):
+        return check_protocol
+    elif isinstance(origin_type, ParamSpec):
+        return check_paramspec
+    elif isinstance(origin_type, TypeVar):
+        return check_typevar
+    elif origin_type.__class__ is NewType:
+        # typing.NewType on Python 3.10+
+        return check_newtype
+    elif (
+        isfunction(origin_type)
+        and getattr(origin_type, "__module__", None) == "typing"
+        and getattr(origin_type, "__qualname__", "").startswith("NewType.")
+        and hasattr(origin_type, "__supertype__")
+    ):
+        # typing.NewType on Python 3.9 and below
+        return check_newtype
+
+    return None
+
+
+checker_lookup_functions.append(builtin_checker_lookup)
+
+
+def load_plugins() -> None:
+    """
+    Load all type checker lookup functions from entry points.
+
+    All entry points from the ``typeguard.checker_lookup`` group are loaded, and the
+    returned lookup functions are added to :data:`typeguard.checker_lookup_functions`.
+
+    .. note:: This function is called implicitly on import, unless the
+        ``TYPEGUARD_DISABLE_PLUGIN_AUTOLOAD`` environment variable is present.
+    """
+
+    for ep in entry_points(group="typeguard.checker_lookup"):
+        try:
+            plugin = ep.load()
+        except Exception as exc:
+            warnings.warn(
+                f"Failed to load plugin {ep.name!r}: " f"{qualified_name(exc)}: {exc}",
+                stacklevel=2,
+            )
+            continue
+
+        if not callable(plugin):
+            warnings.warn(
+                f"Plugin {ep} returned a non-callable object: {plugin!r}", stacklevel=2
+            )
+            continue
+
+        checker_lookup_functions.insert(0, plugin)
diff --git a/lib/typeguard/_config.py b/lib/typeguard/_config.py
new file mode 100644
index 00000000..36efad53
--- /dev/null
+++ b/lib/typeguard/_config.py
@@ -0,0 +1,108 @@
+from __future__ import annotations
+
+from collections.abc import Iterable
+from dataclasses import dataclass
+from enum import Enum, auto
+from typing import TYPE_CHECKING, TypeVar
+
+if TYPE_CHECKING:
+    from ._functions import TypeCheckFailCallback
+
+T = TypeVar("T")
+
+
+class ForwardRefPolicy(Enum):
+    """
+    Defines how unresolved forward references are handled.
+
+    Members:
+
+    * ``ERROR``: propagate the :exc:`NameError` when the forward reference lookup fails
+    * ``WARN``: emit a :class:`~.TypeHintWarning` if the forward reference lookup fails
+    * ``IGNORE``: silently skip checks for unresolveable forward references
+    """
+
+    ERROR = auto()
+    WARN = auto()
+    IGNORE = auto()
+
+
+class CollectionCheckStrategy(Enum):
+    """
+    Specifies how thoroughly the contents of collections are type checked.
+
+    This has an effect on the following built-in checkers:
+
+    * ``AbstractSet``
+    * ``Dict``
+    * ``List``
+    * ``Mapping``
+    * ``Set``
+    * ``Tuple[<type>, ...]`` (arbitrarily sized tuples)
+
+    Members:
+
+    * ``FIRST_ITEM``: check only the first item
+    * ``ALL_ITEMS``: check all items
+    """
+
+    FIRST_ITEM = auto()
+    ALL_ITEMS = auto()
+
+    def iterate_samples(self, collection: Iterable[T]) -> Iterable[T]:
+        if self is CollectionCheckStrategy.FIRST_ITEM:
+            try:
+                return [next(iter(collection))]
+            except StopIteration:
+                return ()
+        else:
+            return collection
+
+
+@dataclass
+class TypeCheckConfiguration:
+    """
+     You can change Typeguard's behavior with these settings.
+
+    .. attribute:: typecheck_fail_callback
+       :type: Callable[[TypeCheckError, TypeCheckMemo], Any]
+
+         Callable that is called when type checking fails.
+
+         Default: ``None`` (the :exc:`~.TypeCheckError` is raised directly)
+
+    .. attribute:: forward_ref_policy
+       :type: ForwardRefPolicy
+
+         Specifies what to do when a forward reference fails to resolve.
+
+         Default: ``WARN``
+
+    .. attribute:: collection_check_strategy
+       :type: CollectionCheckStrategy
+
+         Specifies how thoroughly the contents of collections (list, dict, etc.) are
+         type checked.
+
+         Default: ``FIRST_ITEM``
+
+    .. attribute:: debug_instrumentation
+       :type: bool
+
+         If set to ``True``, the code of modules or functions instrumented by typeguard
+         is printed to ``sys.stderr`` after the instrumentation is done
+
+         Requires Python 3.9 or newer.
+
+         Default: ``False``
+    """
+
+    forward_ref_policy: ForwardRefPolicy = ForwardRefPolicy.WARN
+    typecheck_fail_callback: TypeCheckFailCallback | None = None
+    collection_check_strategy: CollectionCheckStrategy = (
+        CollectionCheckStrategy.FIRST_ITEM
+    )
+    debug_instrumentation: bool = False
+
+
+global_config = TypeCheckConfiguration()
diff --git a/lib/typeguard/_decorators.py b/lib/typeguard/_decorators.py
new file mode 100644
index 00000000..cf325335
--- /dev/null
+++ b/lib/typeguard/_decorators.py
@@ -0,0 +1,235 @@
+from __future__ import annotations
+
+import ast
+import inspect
+import sys
+from collections.abc import Sequence
+from functools import partial
+from inspect import isclass, isfunction
+from types import CodeType, FrameType, FunctionType
+from typing import TYPE_CHECKING, Any, Callable, ForwardRef, TypeVar, cast, overload
+from warnings import warn
+
+from ._config import CollectionCheckStrategy, ForwardRefPolicy, global_config
+from ._exceptions import InstrumentationWarning
+from ._functions import TypeCheckFailCallback
+from ._transformer import TypeguardTransformer
+from ._utils import Unset, function_name, get_stacklevel, is_method_of, unset
+
+if TYPE_CHECKING:
+    from typeshed.stdlib.types import _Cell
+
+    _F = TypeVar("_F")
+
+    def typeguard_ignore(f: _F) -> _F:
+        """This decorator is a noop during static type-checking."""
+        return f
+
+else:
+    from typing import no_type_check as typeguard_ignore  # noqa: F401
+
+T_CallableOrType = TypeVar("T_CallableOrType", bound=Callable[..., Any])
+
+
+def make_cell(value: object) -> _Cell:
+    return (lambda: value).__closure__[0]  # type: ignore[index]
+
+
+def find_target_function(
+    new_code: CodeType, target_path: Sequence[str], firstlineno: int
+) -> CodeType | None:
+    target_name = target_path[0]
+    for const in new_code.co_consts:
+        if isinstance(const, CodeType):
+            if const.co_name == target_name:
+                if const.co_firstlineno == firstlineno:
+                    return const
+                elif len(target_path) > 1:
+                    target_code = find_target_function(
+                        const, target_path[1:], firstlineno
+                    )
+                    if target_code:
+                        return target_code
+
+    return None
+
+
+def instrument(f: T_CallableOrType) -> FunctionType | str:
+    if not getattr(f, "__code__", None):
+        return "no code associated"
+    elif not getattr(f, "__module__", None):
+        return "__module__ attribute is not set"
+    elif f.__code__.co_filename == "<stdin>":
+        return "cannot instrument functions defined in a REPL"
+    elif hasattr(f, "__wrapped__"):
+        return (
+            "@typechecked only supports instrumenting functions wrapped with "
+            "@classmethod, @staticmethod or @property"
+        )
+
+    target_path = [item for item in f.__qualname__.split(".") if item != "<locals>"]
+    module_source = inspect.getsource(sys.modules[f.__module__])
+    module_ast = ast.parse(module_source)
+    instrumentor = TypeguardTransformer(target_path, f.__code__.co_firstlineno)
+    instrumentor.visit(module_ast)
+
+    if not instrumentor.target_node or instrumentor.target_lineno is None:
+        return "instrumentor did not find the target function"
+
+    module_code = compile(module_ast, f.__code__.co_filename, "exec", dont_inherit=True)
+    new_code = find_target_function(
+        module_code, target_path, instrumentor.target_lineno
+    )
+    if not new_code:
+        return "cannot find the target function in the AST"
+
+    if global_config.debug_instrumentation and sys.version_info >= (3, 9):
+        # Find the matching AST node, then unparse it to source and print to stdout
+        print(
+            f"Source code of {f.__qualname__}() after instrumentation:"
+            "\n----------------------------------------------",
+            file=sys.stderr,
+        )
+        print(ast.unparse(instrumentor.target_node), file=sys.stderr)
+        print(
+            "----------------------------------------------",
+            file=sys.stderr,
+        )
+
+    closure = f.__closure__
+    if new_code.co_freevars != f.__code__.co_freevars:
+        # Create a new closure and find values for the new free variables
+        frame = cast(FrameType, inspect.currentframe())
+        frame = cast(FrameType, frame.f_back)
+        frame_locals = cast(FrameType, frame.f_back).f_locals
+        cells: list[_Cell] = []
+        for key in new_code.co_freevars:
+            if key in instrumentor.names_used_in_annotations:
+                # Find the value and make a new cell from it
+                value = frame_locals.get(key) or ForwardRef(key)
+                cells.append(make_cell(value))
+            else:
+                # Reuse the cell from the existing closure
+                assert f.__closure__
+                cells.append(f.__closure__[f.__code__.co_freevars.index(key)])
+
+        closure = tuple(cells)
+
+    new_function = FunctionType(new_code, f.__globals__, f.__name__, closure=closure)
+    new_function.__module__ = f.__module__
+    new_function.__name__ = f.__name__
+    new_function.__qualname__ = f.__qualname__
+    new_function.__annotations__ = f.__annotations__
+    new_function.__doc__ = f.__doc__
+    new_function.__defaults__ = f.__defaults__
+    new_function.__kwdefaults__ = f.__kwdefaults__
+    return new_function
+
+
+@overload
+def typechecked(
+    *,
+    forward_ref_policy: ForwardRefPolicy | Unset = unset,
+    typecheck_fail_callback: TypeCheckFailCallback | Unset = unset,
+    collection_check_strategy: CollectionCheckStrategy | Unset = unset,
+    debug_instrumentation: bool | Unset = unset,
+) -> Callable[[T_CallableOrType], T_CallableOrType]: ...
+
+
+@overload
+def typechecked(target: T_CallableOrType) -> T_CallableOrType: ...
+
+
+def typechecked(
+    target: T_CallableOrType | None = None,
+    *,
+    forward_ref_policy: ForwardRefPolicy | Unset = unset,
+    typecheck_fail_callback: TypeCheckFailCallback | Unset = unset,
+    collection_check_strategy: CollectionCheckStrategy | Unset = unset,
+    debug_instrumentation: bool | Unset = unset,
+) -> Any:
+    """
+    Instrument the target function to perform run-time type checking.
+
+    This decorator recompiles the target function, injecting code to type check
+    arguments, return values, yield values (excluding ``yield from``) and assignments to
+    annotated local variables.
+
+    This can also be used as a class decorator. This will instrument all type annotated
+    methods, including :func:`@classmethod <classmethod>`,
+    :func:`@staticmethod <staticmethod>`,  and :class:`@property <property>` decorated
+    methods in the class.
+
+    .. note:: When Python is run in optimized mode (``-O`` or ``-OO``, this decorator
+        is a no-op). This is a feature meant for selectively introducing type checking
+        into a code base where the checks aren't meant to be run in production.
+
+    :param target: the function or class to enable type checking for
+    :param forward_ref_policy: override for
+        :attr:`.TypeCheckConfiguration.forward_ref_policy`
+    :param typecheck_fail_callback: override for
+        :attr:`.TypeCheckConfiguration.typecheck_fail_callback`
+    :param collection_check_strategy: override for
+        :attr:`.TypeCheckConfiguration.collection_check_strategy`
+    :param debug_instrumentation: override for
+        :attr:`.TypeCheckConfiguration.debug_instrumentation`
+
+    """
+    if target is None:
+        return partial(
+            typechecked,
+            forward_ref_policy=forward_ref_policy,
+            typecheck_fail_callback=typecheck_fail_callback,
+            collection_check_strategy=collection_check_strategy,
+            debug_instrumentation=debug_instrumentation,
+        )
+
+    if not __debug__:
+        return target
+
+    if isclass(target):
+        for key, attr in target.__dict__.items():
+            if is_method_of(attr, target):
+                retval = instrument(attr)
+                if isfunction(retval):
+                    setattr(target, key, retval)
+            elif isinstance(attr, (classmethod, staticmethod)):
+                if is_method_of(attr.__func__, target):
+                    retval = instrument(attr.__func__)
+                    if isfunction(retval):
+                        wrapper = attr.__class__(retval)
+                        setattr(target, key, wrapper)
+            elif isinstance(attr, property):
+                kwargs: dict[str, Any] = dict(doc=attr.__doc__)
+                for name in ("fset", "fget", "fdel"):
+                    property_func = kwargs[name] = getattr(attr, name)
+                    if is_method_of(property_func, target):
+                        retval = instrument(property_func)
+                        if isfunction(retval):
+                            kwargs[name] = retval
+
+                setattr(target, key, attr.__class__(**kwargs))
+
+        return target
+
+    # Find either the first Python wrapper or the actual function
+    wrapper_class: (
+        type[classmethod[Any, Any, Any]] | type[staticmethod[Any, Any]] | None
+    ) = None
+    if isinstance(target, (classmethod, staticmethod)):
+        wrapper_class = target.__class__
+        target = target.__func__
+
+    retval = instrument(target)
+    if isinstance(retval, str):
+        warn(
+            f"{retval} -- not typechecking {function_name(target)}",
+            InstrumentationWarning,
+            stacklevel=get_stacklevel(),
+        )
+        return target
+
+    if wrapper_class is None:
+        return retval
+    else:
+        return wrapper_class(retval)
diff --git a/lib/typeguard/_exceptions.py b/lib/typeguard/_exceptions.py
new file mode 100644
index 00000000..625437a6
--- /dev/null
+++ b/lib/typeguard/_exceptions.py
@@ -0,0 +1,42 @@
+from collections import deque
+from typing import Deque
+
+
+class TypeHintWarning(UserWarning):
+    """
+    A warning that is emitted when a type hint in string form could not be resolved to
+    an actual type.
+    """
+
+
+class TypeCheckWarning(UserWarning):
+    """Emitted by typeguard's type checkers when a type mismatch is detected."""
+
+    def __init__(self, message: str):
+        super().__init__(message)
+
+
+class InstrumentationWarning(UserWarning):
+    """Emitted when there's a problem with instrumenting a function for type checks."""
+
+    def __init__(self, message: str):
+        super().__init__(message)
+
+
+class TypeCheckError(Exception):
+    """
+    Raised by typeguard's type checkers when a type mismatch is detected.
+    """
+
+    def __init__(self, message: str):
+        super().__init__(message)
+        self._path: Deque[str] = deque()
+
+    def append_path_element(self, element: str) -> None:
+        self._path.append(element)
+
+    def __str__(self) -> str:
+        if self._path:
+            return " of ".join(self._path) + " " + str(self.args[0])
+        else:
+            return str(self.args[0])
diff --git a/lib/typeguard/_functions.py b/lib/typeguard/_functions.py
new file mode 100644
index 00000000..28497856
--- /dev/null
+++ b/lib/typeguard/_functions.py
@@ -0,0 +1,308 @@
+from __future__ import annotations
+
+import sys
+import warnings
+from typing import Any, Callable, NoReturn, TypeVar, Union, overload
+
+from . import _suppression
+from ._checkers import BINARY_MAGIC_METHODS, check_type_internal
+from ._config import (
+    CollectionCheckStrategy,
+    ForwardRefPolicy,
+    TypeCheckConfiguration,
+)
+from ._exceptions import TypeCheckError, TypeCheckWarning
+from ._memo import TypeCheckMemo
+from ._utils import get_stacklevel, qualified_name
+
+if sys.version_info >= (3, 11):
+    from typing import Literal, Never, TypeAlias
+else:
+    from typing_extensions import Literal, Never, TypeAlias
+
+T = TypeVar("T")
+TypeCheckFailCallback: TypeAlias = Callable[[TypeCheckError, TypeCheckMemo], Any]
+
+
+@overload
+def check_type(
+    value: object,
+    expected_type: type[T],
+    *,
+    forward_ref_policy: ForwardRefPolicy = ...,
+    typecheck_fail_callback: TypeCheckFailCallback | None = ...,
+    collection_check_strategy: CollectionCheckStrategy = ...,
+) -> T: ...
+
+
+@overload
+def check_type(
+    value: object,
+    expected_type: Any,
+    *,
+    forward_ref_policy: ForwardRefPolicy = ...,
+    typecheck_fail_callback: TypeCheckFailCallback | None = ...,
+    collection_check_strategy: CollectionCheckStrategy = ...,
+) -> Any: ...
+
+
+def check_type(
+    value: object,
+    expected_type: Any,
+    *,
+    forward_ref_policy: ForwardRefPolicy = TypeCheckConfiguration().forward_ref_policy,
+    typecheck_fail_callback: TypeCheckFailCallback | None = (
+        TypeCheckConfiguration().typecheck_fail_callback
+    ),
+    collection_check_strategy: CollectionCheckStrategy = (
+        TypeCheckConfiguration().collection_check_strategy
+    ),
+) -> Any:
+    """
+    Ensure that ``value`` matches ``expected_type``.
+
+    The types from the :mod:`typing` module do not support :func:`isinstance` or
+    :func:`issubclass` so a number of type specific checks are required. This function
+    knows which checker to call for which type.
+
+    This function wraps :func:`~.check_type_internal` in the following ways:
+
+    * Respects type checking suppression (:func:`~.suppress_type_checks`)
+    * Forms a :class:`~.TypeCheckMemo` from the current stack frame
+    * Calls the configured type check fail callback if the check fails
+
+    Note that this function is independent of the globally shared configuration in
+    :data:`typeguard.config`. This means that usage within libraries is safe from being
+    affected configuration changes made by other libraries or by the integrating
+    application. Instead, configuration options have the same default values as their
+    corresponding fields in :class:`TypeCheckConfiguration`.
+
+    :param value: value to be checked against ``expected_type``
+    :param expected_type: a class or generic type instance, or a tuple of such things
+    :param forward_ref_policy: see :attr:`TypeCheckConfiguration.forward_ref_policy`
+    :param typecheck_fail_callback:
+        see :attr`TypeCheckConfiguration.typecheck_fail_callback`
+    :param collection_check_strategy:
+        see :attr:`TypeCheckConfiguration.collection_check_strategy`
+    :return: ``value``, unmodified
+    :raises TypeCheckError: if there is a type mismatch
+
+    """
+    if type(expected_type) is tuple:
+        expected_type = Union[expected_type]
+
+    config = TypeCheckConfiguration(
+        forward_ref_policy=forward_ref_policy,
+        typecheck_fail_callback=typecheck_fail_callback,
+        collection_check_strategy=collection_check_strategy,
+    )
+
+    if _suppression.type_checks_suppressed or expected_type is Any:
+        return value
+
+    frame = sys._getframe(1)
+    memo = TypeCheckMemo(frame.f_globals, frame.f_locals, config=config)
+    try:
+        check_type_internal(value, expected_type, memo)
+    except TypeCheckError as exc:
+        exc.append_path_element(qualified_name(value, add_class_prefix=True))
+        if config.typecheck_fail_callback:
+            config.typecheck_fail_callback(exc, memo)
+        else:
+            raise
+
+    return value
+
+
+def check_argument_types(
+    func_name: str,
+    arguments: dict[str, tuple[Any, Any]],
+    memo: TypeCheckMemo,
+) -> Literal[True]:
+    if _suppression.type_checks_suppressed:
+        return True
+
+    for argname, (value, annotation) in arguments.items():
+        if annotation is NoReturn or annotation is Never:
+            exc = TypeCheckError(
+                f"{func_name}() was declared never to be called but it was"
+            )
+            if memo.config.typecheck_fail_callback:
+                memo.config.typecheck_fail_callback(exc, memo)
+            else:
+                raise exc
+
+        try:
+            check_type_internal(value, annotation, memo)
+        except TypeCheckError as exc:
+            qualname = qualified_name(value, add_class_prefix=True)
+            exc.append_path_element(f'argument "{argname}" ({qualname})')
+            if memo.config.typecheck_fail_callback:
+                memo.config.typecheck_fail_callback(exc, memo)
+            else:
+                raise
+
+    return True
+
+
+def check_return_type(
+    func_name: str,
+    retval: T,
+    annotation: Any,
+    memo: TypeCheckMemo,
+) -> T:
+    if _suppression.type_checks_suppressed:
+        return retval
+
+    if annotation is NoReturn or annotation is Never:
+        exc = TypeCheckError(f"{func_name}() was declared never to return but it did")
+        if memo.config.typecheck_fail_callback:
+            memo.config.typecheck_fail_callback(exc, memo)
+        else:
+            raise exc
+
+    try:
+        check_type_internal(retval, annotation, memo)
+    except TypeCheckError as exc:
+        # Allow NotImplemented if this is a binary magic method (__eq__() et al)
+        if retval is NotImplemented and annotation is bool:
+            # This does (and cannot) not check if it's actually a method
+            func_name = func_name.rsplit(".", 1)[-1]
+            if func_name in BINARY_MAGIC_METHODS:
+                return retval
+
+        qualname = qualified_name(retval, add_class_prefix=True)
+        exc.append_path_element(f"the return value ({qualname})")
+        if memo.config.typecheck_fail_callback:
+            memo.config.typecheck_fail_callback(exc, memo)
+        else:
+            raise
+
+    return retval
+
+
+def check_send_type(
+    func_name: str,
+    sendval: T,
+    annotation: Any,
+    memo: TypeCheckMemo,
+) -> T:
+    if _suppression.type_checks_suppressed:
+        return sendval
+
+    if annotation is NoReturn or annotation is Never:
+        exc = TypeCheckError(
+            f"{func_name}() was declared never to be sent a value to but it was"
+        )
+        if memo.config.typecheck_fail_callback:
+            memo.config.typecheck_fail_callback(exc, memo)
+        else:
+            raise exc
+
+    try:
+        check_type_internal(sendval, annotation, memo)
+    except TypeCheckError as exc:
+        qualname = qualified_name(sendval, add_class_prefix=True)
+        exc.append_path_element(f"the value sent to generator ({qualname})")
+        if memo.config.typecheck_fail_callback:
+            memo.config.typecheck_fail_callback(exc, memo)
+        else:
+            raise
+
+    return sendval
+
+
+def check_yield_type(
+    func_name: str,
+    yieldval: T,
+    annotation: Any,
+    memo: TypeCheckMemo,
+) -> T:
+    if _suppression.type_checks_suppressed:
+        return yieldval
+
+    if annotation is NoReturn or annotation is Never:
+        exc = TypeCheckError(f"{func_name}() was declared never to yield but it did")
+        if memo.config.typecheck_fail_callback:
+            memo.config.typecheck_fail_callback(exc, memo)
+        else:
+            raise exc
+
+    try:
+        check_type_internal(yieldval, annotation, memo)
+    except TypeCheckError as exc:
+        qualname = qualified_name(yieldval, add_class_prefix=True)
+        exc.append_path_element(f"the yielded value ({qualname})")
+        if memo.config.typecheck_fail_callback:
+            memo.config.typecheck_fail_callback(exc, memo)
+        else:
+            raise
+
+    return yieldval
+
+
+def check_variable_assignment(
+    value: object, varname: str, annotation: Any, memo: TypeCheckMemo
+) -> Any:
+    if _suppression.type_checks_suppressed:
+        return value
+
+    try:
+        check_type_internal(value, annotation, memo)
+    except TypeCheckError as exc:
+        qualname = qualified_name(value, add_class_prefix=True)
+        exc.append_path_element(f"value assigned to {varname} ({qualname})")
+        if memo.config.typecheck_fail_callback:
+            memo.config.typecheck_fail_callback(exc, memo)
+        else:
+            raise
+
+    return value
+
+
+def check_multi_variable_assignment(
+    value: Any, targets: list[dict[str, Any]], memo: TypeCheckMemo
+) -> Any:
+    if max(len(target) for target in targets) == 1:
+        iterated_values = [value]
+    else:
+        iterated_values = list(value)
+
+    if not _suppression.type_checks_suppressed:
+        for expected_types in targets:
+            value_index = 0
+            for ann_index, (varname, expected_type) in enumerate(
+                expected_types.items()
+            ):
+                if varname.startswith("*"):
+                    varname = varname[1:]
+                    keys_left = len(expected_types) - 1 - ann_index
+                    next_value_index = len(iterated_values) - keys_left
+                    obj: object = iterated_values[value_index:next_value_index]
+                    value_index = next_value_index
+                else:
+                    obj = iterated_values[value_index]
+                    value_index += 1
+
+                try:
+                    check_type_internal(obj, expected_type, memo)
+                except TypeCheckError as exc:
+                    qualname = qualified_name(obj, add_class_prefix=True)
+                    exc.append_path_element(f"value assigned to {varname} ({qualname})")
+                    if memo.config.typecheck_fail_callback:
+                        memo.config.typecheck_fail_callback(exc, memo)
+                    else:
+                        raise
+
+    return iterated_values[0] if len(iterated_values) == 1 else iterated_values
+
+
+def warn_on_error(exc: TypeCheckError, memo: TypeCheckMemo) -> None:
+    """
+    Emit a warning on a type mismatch.
+
+    This is intended to be used as an error handler in
+    :attr:`TypeCheckConfiguration.typecheck_fail_callback`.
+
+    """
+    warnings.warn(TypeCheckWarning(str(exc)), stacklevel=get_stacklevel())
diff --git a/lib/typeguard/_importhook.py b/lib/typeguard/_importhook.py
new file mode 100644
index 00000000..8590540a
--- /dev/null
+++ b/lib/typeguard/_importhook.py
@@ -0,0 +1,213 @@
+from __future__ import annotations
+
+import ast
+import sys
+import types
+from collections.abc import Callable, Iterable
+from importlib.abc import MetaPathFinder
+from importlib.machinery import ModuleSpec, SourceFileLoader
+from importlib.util import cache_from_source, decode_source
+from inspect import isclass
+from os import PathLike
+from types import CodeType, ModuleType, TracebackType
+from typing import Sequence, TypeVar
+from unittest.mock import patch
+
+from ._config import global_config
+from ._transformer import TypeguardTransformer
+
+if sys.version_info >= (3, 12):
+    from collections.abc import Buffer
+else:
+    from typing_extensions import Buffer
+
+if sys.version_info >= (3, 11):
+    from typing import ParamSpec
+else:
+    from typing_extensions import ParamSpec
+
+if sys.version_info >= (3, 10):
+    from importlib.metadata import PackageNotFoundError, version
+else:
+    from importlib_metadata import PackageNotFoundError, version
+
+try:
+    OPTIMIZATION = "typeguard" + "".join(version("typeguard").split(".")[:3])
+except PackageNotFoundError:
+    OPTIMIZATION = "typeguard"
+
+P = ParamSpec("P")
+T = TypeVar("T")
+
+
+# The name of this function is magical
+def _call_with_frames_removed(
+    f: Callable[P, T], *args: P.args, **kwargs: P.kwargs
+) -> T:
+    return f(*args, **kwargs)
+
+
+def optimized_cache_from_source(path: str, debug_override: bool | None = None) -> str:
+    return cache_from_source(path, debug_override, optimization=OPTIMIZATION)
+
+
+class TypeguardLoader(SourceFileLoader):
+    @staticmethod
+    def source_to_code(
+        data: Buffer | str | ast.Module | ast.Expression | ast.Interactive,
+        path: Buffer | str | PathLike[str] = "<string>",
+    ) -> CodeType:
+        if isinstance(data, (ast.Module, ast.Expression, ast.Interactive)):
+            tree = data
+        else:
+            if isinstance(data, str):
+                source = data
+            else:
+                source = decode_source(data)
+
+            tree = _call_with_frames_removed(
+                ast.parse,
+                source,
+                path,
+                "exec",
+            )
+
+        tree = TypeguardTransformer().visit(tree)
+        ast.fix_missing_locations(tree)
+
+        if global_config.debug_instrumentation and sys.version_info >= (3, 9):
+            print(
+                f"Source code of {path!r} after instrumentation:\n"
+                "----------------------------------------------",
+                file=sys.stderr,
+            )
+            print(ast.unparse(tree), file=sys.stderr)
+            print("----------------------------------------------", file=sys.stderr)
+
+        return _call_with_frames_removed(
+            compile, tree, path, "exec", 0, dont_inherit=True
+        )
+
+    def exec_module(self, module: ModuleType) -> None:
+        # Use a custom optimization marker – the import lock should make this monkey
+        # patch safe
+        with patch(
+            "importlib._bootstrap_external.cache_from_source",
+            optimized_cache_from_source,
+        ):
+            super().exec_module(module)
+
+
+class TypeguardFinder(MetaPathFinder):
+    """
+    Wraps another path finder and instruments the module with
+    :func:`@typechecked <typeguard.typechecked>` if :meth:`should_instrument` returns
+    ``True``.
+
+    Should not be used directly, but rather via :func:`~.install_import_hook`.
+
+    .. versionadded:: 2.6
+    """
+
+    def __init__(self, packages: list[str] | None, original_pathfinder: MetaPathFinder):
+        self.packages = packages
+        self._original_pathfinder = original_pathfinder
+
+    def find_spec(
+        self,
+        fullname: str,
+        path: Sequence[str] | None,
+        target: types.ModuleType | None = None,
+    ) -> ModuleSpec | None:
+        if self.should_instrument(fullname):
+            spec = self._original_pathfinder.find_spec(fullname, path, target)
+            if spec is not None and isinstance(spec.loader, SourceFileLoader):
+                spec.loader = TypeguardLoader(spec.loader.name, spec.loader.path)
+                return spec
+
+        return None
+
+    def should_instrument(self, module_name: str) -> bool:
+        """
+        Determine whether the module with the given name should be instrumented.
+
+        :param module_name: full name of the module that is about to be imported (e.g.
+            ``xyz.abc``)
+
+        """
+        if self.packages is None:
+            return True
+
+        for package in self.packages:
+            if module_name == package or module_name.startswith(package + "."):
+                return True
+
+        return False
+
+
+class ImportHookManager:
+    """
+    A handle that can be used to uninstall the Typeguard import hook.
+    """
+
+    def __init__(self, hook: MetaPathFinder):
+        self.hook = hook
+
+    def __enter__(self) -> None:
+        pass
+
+    def __exit__(
+        self,
+        exc_type: type[BaseException],
+        exc_val: BaseException,
+        exc_tb: TracebackType,
+    ) -> None:
+        self.uninstall()
+
+    def uninstall(self) -> None:
+        """Uninstall the import hook."""
+        try:
+            sys.meta_path.remove(self.hook)
+        except ValueError:
+            pass  # already removed
+
+
+def install_import_hook(
+    packages: Iterable[str] | None = None,
+    *,
+    cls: type[TypeguardFinder] = TypeguardFinder,
+) -> ImportHookManager:
+    """
+    Install an import hook that instruments functions for automatic type checking.
+
+    This only affects modules loaded **after** this hook has been installed.
+
+    :param packages: an iterable of package names to instrument, or ``None`` to
+        instrument all packages
+    :param cls: a custom meta path finder class
+    :return: a context manager that uninstalls the hook on exit (or when you call
+        ``.uninstall()``)
+
+    .. versionadded:: 2.6
+
+    """
+    if packages is None:
+        target_packages: list[str] | None = None
+    elif isinstance(packages, str):
+        target_packages = [packages]
+    else:
+        target_packages = list(packages)
+
+    for finder in sys.meta_path:
+        if (
+            isclass(finder)
+            and finder.__name__ == "PathFinder"
+            and hasattr(finder, "find_spec")
+        ):
+            break
+    else:
+        raise RuntimeError("Cannot find a PathFinder in sys.meta_path")
+
+    hook = cls(target_packages, finder)
+    sys.meta_path.insert(0, hook)
+    return ImportHookManager(hook)
diff --git a/lib/typeguard/_memo.py b/lib/typeguard/_memo.py
new file mode 100644
index 00000000..1d0d80c6
--- /dev/null
+++ b/lib/typeguard/_memo.py
@@ -0,0 +1,48 @@
+from __future__ import annotations
+
+from typing import Any
+
+from typeguard._config import TypeCheckConfiguration, global_config
+
+
+class TypeCheckMemo:
+    """
+    Contains information necessary for type checkers to do their work.
+
+    .. attribute:: globals
+       :type: dict[str, Any]
+
+        Dictionary of global variables to use for resolving forward references.
+
+    .. attribute:: locals
+       :type: dict[str, Any]
+
+        Dictionary of local variables to use for resolving forward references.
+
+    .. attribute:: self_type
+       :type: type | None
+
+        When running type checks within an instance method or class method, this is the
+        class object that the first argument (usually named ``self`` or ``cls``) refers
+        to.
+
+    .. attribute:: config
+       :type: TypeCheckConfiguration
+
+         Contains the configuration for a particular set of type checking operations.
+    """
+
+    __slots__ = "globals", "locals", "self_type", "config"
+
+    def __init__(
+        self,
+        globals: dict[str, Any],
+        locals: dict[str, Any],
+        *,
+        self_type: type | None = None,
+        config: TypeCheckConfiguration = global_config,
+    ):
+        self.globals = globals
+        self.locals = locals
+        self.self_type = self_type
+        self.config = config
diff --git a/lib/typeguard/_pytest_plugin.py b/lib/typeguard/_pytest_plugin.py
new file mode 100644
index 00000000..7bca9c26
--- /dev/null
+++ b/lib/typeguard/_pytest_plugin.py
@@ -0,0 +1,126 @@
+from __future__ import annotations
+
+import sys
+import warnings
+from typing import Any, Literal
+
+from pytest import Config, Parser
+
+from typeguard._config import CollectionCheckStrategy, ForwardRefPolicy, global_config
+from typeguard._exceptions import InstrumentationWarning
+from typeguard._importhook import install_import_hook
+from typeguard._utils import qualified_name, resolve_reference
+
+
+def pytest_addoption(parser: Parser) -> None:
+    def add_ini_option(
+        opt_type: (
+            Literal["string", "paths", "pathlist", "args", "linelist", "bool"] | None
+        )
+    ) -> None:
+        parser.addini(
+            group.options[-1].names()[0][2:],
+            group.options[-1].attrs()["help"],
+            opt_type,
+        )
+
+    group = parser.getgroup("typeguard")
+    group.addoption(
+        "--typeguard-packages",
+        action="store",
+        help="comma separated name list of packages and modules to instrument for "
+        "type checking, or :all: to instrument all modules loaded after typeguard",
+    )
+    add_ini_option("linelist")
+
+    group.addoption(
+        "--typeguard-debug-instrumentation",
+        action="store_true",
+        help="print all instrumented code to stderr",
+    )
+    add_ini_option("bool")
+
+    group.addoption(
+        "--typeguard-typecheck-fail-callback",
+        action="store",
+        help=(
+            "a module:varname (e.g. typeguard:warn_on_error) reference to a function "
+            "that is called (with the exception, and memo object as arguments) to "
+            "handle a TypeCheckError"
+        ),
+    )
+    add_ini_option("string")
+
+    group.addoption(
+        "--typeguard-forward-ref-policy",
+        action="store",
+        choices=list(ForwardRefPolicy.__members__),
+        help=(
+            "determines how to deal with unresolveable forward references in type "
+            "annotations"
+        ),
+    )
+    add_ini_option("string")
+
+    group.addoption(
+        "--typeguard-collection-check-strategy",
+        action="store",
+        choices=list(CollectionCheckStrategy.__members__),
+        help="determines how thoroughly to check collections (list, dict, etc)",
+    )
+    add_ini_option("string")
+
+
+def pytest_configure(config: Config) -> None:
+    def getoption(name: str) -> Any:
+        return config.getoption(name.replace("-", "_")) or config.getini(name)
+
+    packages: list[str] | None = []
+    if packages_option := config.getoption("typeguard_packages"):
+        packages = [pkg.strip() for pkg in packages_option.split(",")]
+    elif packages_ini := config.getini("typeguard-packages"):
+        packages = packages_ini
+
+    if packages:
+        if packages == [":all:"]:
+            packages = None
+        else:
+            already_imported_packages = sorted(
+                package for package in packages if package in sys.modules
+            )
+            if already_imported_packages:
+                warnings.warn(
+                    f"typeguard cannot check these packages because they are already "
+                    f"imported: {', '.join(already_imported_packages)}",
+                    InstrumentationWarning,
+                    stacklevel=1,
+                )
+
+        install_import_hook(packages=packages)
+
+    debug_option = getoption("typeguard-debug-instrumentation")
+    if debug_option:
+        global_config.debug_instrumentation = True
+
+    fail_callback_option = getoption("typeguard-typecheck-fail-callback")
+    if fail_callback_option:
+        callback = resolve_reference(fail_callback_option)
+        if not callable(callback):
+            raise TypeError(
+                f"{fail_callback_option} ({qualified_name(callback.__class__)}) is not "
+                f"a callable"
+            )
+
+        global_config.typecheck_fail_callback = callback
+
+    forward_ref_policy_option = getoption("typeguard-forward-ref-policy")
+    if forward_ref_policy_option:
+        forward_ref_policy = ForwardRefPolicy.__members__[forward_ref_policy_option]
+        global_config.forward_ref_policy = forward_ref_policy
+
+    collection_check_strategy_option = getoption("typeguard-collection-check-strategy")
+    if collection_check_strategy_option:
+        collection_check_strategy = CollectionCheckStrategy.__members__[
+            collection_check_strategy_option
+        ]
+        global_config.collection_check_strategy = collection_check_strategy
diff --git a/lib/typeguard/_suppression.py b/lib/typeguard/_suppression.py
new file mode 100644
index 00000000..f6899a9f
--- /dev/null
+++ b/lib/typeguard/_suppression.py
@@ -0,0 +1,86 @@
+from __future__ import annotations
+
+import sys
+from collections.abc import Callable, Generator
+from contextlib import contextmanager
+from functools import update_wrapper
+from threading import Lock
+from typing import ContextManager, TypeVar, overload
+
+if sys.version_info >= (3, 10):
+    from typing import ParamSpec
+else:
+    from typing_extensions import ParamSpec
+
+P = ParamSpec("P")
+T = TypeVar("T")
+
+type_checks_suppressed = 0
+type_checks_suppress_lock = Lock()
+
+
+@overload
+def suppress_type_checks(func: Callable[P, T]) -> Callable[P, T]: ...
+
+
+@overload
+def suppress_type_checks() -> ContextManager[None]: ...
+
+
+def suppress_type_checks(
+    func: Callable[P, T] | None = None
+) -> Callable[P, T] | ContextManager[None]:
+    """
+    Temporarily suppress all type checking.
+
+    This function has two operating modes, based on how it's used:
+
+    #. as a context manager (``with suppress_type_checks(): ...``)
+    #. as a decorator (``@suppress_type_checks``)
+
+    When used as a context manager, :func:`check_type` and any automatically
+    instrumented functions skip the actual type checking. These context managers can be
+    nested.
+
+    When used as a decorator, all type checking is suppressed while the function is
+    running.
+
+    Type checking will resume once no more context managers are active and no decorated
+    functions are running.
+
+    Both operating modes are thread-safe.
+
+    """
+
+    def wrapper(*args: P.args, **kwargs: P.kwargs) -> T:
+        global type_checks_suppressed
+
+        with type_checks_suppress_lock:
+            type_checks_suppressed += 1
+
+        assert func is not None
+        try:
+            return func(*args, **kwargs)
+        finally:
+            with type_checks_suppress_lock:
+                type_checks_suppressed -= 1
+
+    def cm() -> Generator[None, None, None]:
+        global type_checks_suppressed
+
+        with type_checks_suppress_lock:
+            type_checks_suppressed += 1
+
+        try:
+            yield
+        finally:
+            with type_checks_suppress_lock:
+                type_checks_suppressed -= 1
+
+    if func is None:
+        # Context manager mode
+        return contextmanager(cm)()
+    else:
+        # Decorator mode
+        update_wrapper(wrapper, func)
+        return wrapper
diff --git a/lib/typeguard/_transformer.py b/lib/typeguard/_transformer.py
new file mode 100644
index 00000000..13ac3630
--- /dev/null
+++ b/lib/typeguard/_transformer.py
@@ -0,0 +1,1229 @@
+from __future__ import annotations
+
+import ast
+import builtins
+import sys
+import typing
+from ast import (
+    AST,
+    Add,
+    AnnAssign,
+    Assign,
+    AsyncFunctionDef,
+    Attribute,
+    AugAssign,
+    BinOp,
+    BitAnd,
+    BitOr,
+    BitXor,
+    Call,
+    ClassDef,
+    Constant,
+    Dict,
+    Div,
+    Expr,
+    Expression,
+    FloorDiv,
+    FunctionDef,
+    If,
+    Import,
+    ImportFrom,
+    Index,
+    List,
+    Load,
+    LShift,
+    MatMult,
+    Mod,
+    Module,
+    Mult,
+    Name,
+    NamedExpr,
+    NodeTransformer,
+    NodeVisitor,
+    Pass,
+    Pow,
+    Return,
+    RShift,
+    Starred,
+    Store,
+    Sub,
+    Subscript,
+    Tuple,
+    Yield,
+    YieldFrom,
+    alias,
+    copy_location,
+    expr,
+    fix_missing_locations,
+    keyword,
+    walk,
+)
+from collections import defaultdict
+from collections.abc import Generator, Sequence
+from contextlib import contextmanager
+from copy import deepcopy
+from dataclasses import dataclass, field
+from typing import Any, ClassVar, cast, overload
+
+generator_names = (
+    "typing.Generator",
+    "collections.abc.Generator",
+    "typing.Iterator",
+    "collections.abc.Iterator",
+    "typing.Iterable",
+    "collections.abc.Iterable",
+    "typing.AsyncIterator",
+    "collections.abc.AsyncIterator",
+    "typing.AsyncIterable",
+    "collections.abc.AsyncIterable",
+    "typing.AsyncGenerator",
+    "collections.abc.AsyncGenerator",
+)
+anytype_names = (
+    "typing.Any",
+    "typing_extensions.Any",
+)
+literal_names = (
+    "typing.Literal",
+    "typing_extensions.Literal",
+)
+annotated_names = (
+    "typing.Annotated",
+    "typing_extensions.Annotated",
+)
+ignore_decorators = (
+    "typing.no_type_check",
+    "typeguard.typeguard_ignore",
+)
+aug_assign_functions = {
+    Add: "iadd",
+    Sub: "isub",
+    Mult: "imul",
+    MatMult: "imatmul",
+    Div: "itruediv",
+    FloorDiv: "ifloordiv",
+    Mod: "imod",
+    Pow: "ipow",
+    LShift: "ilshift",
+    RShift: "irshift",
+    BitAnd: "iand",
+    BitXor: "ixor",
+    BitOr: "ior",
+}
+
+
+@dataclass
+class TransformMemo:
+    node: Module | ClassDef | FunctionDef | AsyncFunctionDef | None
+    parent: TransformMemo | None
+    path: tuple[str, ...]
+    joined_path: Constant = field(init=False)
+    return_annotation: expr | None = None
+    yield_annotation: expr | None = None
+    send_annotation: expr | None = None
+    is_async: bool = False
+    local_names: set[str] = field(init=False, default_factory=set)
+    imported_names: dict[str, str] = field(init=False, default_factory=dict)
+    ignored_names: set[str] = field(init=False, default_factory=set)
+    load_names: defaultdict[str, dict[str, Name]] = field(
+        init=False, default_factory=lambda: defaultdict(dict)
+    )
+    has_yield_expressions: bool = field(init=False, default=False)
+    has_return_expressions: bool = field(init=False, default=False)
+    memo_var_name: Name | None = field(init=False, default=None)
+    should_instrument: bool = field(init=False, default=True)
+    variable_annotations: dict[str, expr] = field(init=False, default_factory=dict)
+    configuration_overrides: dict[str, Any] = field(init=False, default_factory=dict)
+    code_inject_index: int = field(init=False, default=0)
+
+    def __post_init__(self) -> None:
+        elements: list[str] = []
+        memo = self
+        while isinstance(memo.node, (ClassDef, FunctionDef, AsyncFunctionDef)):
+            elements.insert(0, memo.node.name)
+            if not memo.parent:
+                break
+
+            memo = memo.parent
+            if isinstance(memo.node, (FunctionDef, AsyncFunctionDef)):
+                elements.insert(0, "<locals>")
+
+        self.joined_path = Constant(".".join(elements))
+
+        # Figure out where to insert instrumentation code
+        if self.node:
+            for index, child in enumerate(self.node.body):
+                if isinstance(child, ImportFrom) and child.module == "__future__":
+                    # (module only) __future__ imports must come first
+                    continue
+                elif (
+                    isinstance(child, Expr)
+                    and isinstance(child.value, Constant)
+                    and isinstance(child.value.value, str)
+                ):
+                    continue  # docstring
+
+                self.code_inject_index = index
+                break
+
+    def get_unused_name(self, name: str) -> str:
+        memo: TransformMemo | None = self
+        while memo is not None:
+            if name in memo.local_names:
+                memo = self
+                name += "_"
+            else:
+                memo = memo.parent
+
+        self.local_names.add(name)
+        return name
+
+    def is_ignored_name(self, expression: expr | Expr | None) -> bool:
+        top_expression = (
+            expression.value if isinstance(expression, Expr) else expression
+        )
+
+        if isinstance(top_expression, Attribute) and isinstance(
+            top_expression.value, Name
+        ):
+            name = top_expression.value.id
+        elif isinstance(top_expression, Name):
+            name = top_expression.id
+        else:
+            return False
+
+        memo: TransformMemo | None = self
+        while memo is not None:
+            if name in memo.ignored_names:
+                return True
+
+            memo = memo.parent
+
+        return False
+
+    def get_memo_name(self) -> Name:
+        if not self.memo_var_name:
+            self.memo_var_name = Name(id="memo", ctx=Load())
+
+        return self.memo_var_name
+
+    def get_import(self, module: str, name: str) -> Name:
+        if module in self.load_names and name in self.load_names[module]:
+            return self.load_names[module][name]
+
+        qualified_name = f"{module}.{name}"
+        if name in self.imported_names and self.imported_names[name] == qualified_name:
+            return Name(id=name, ctx=Load())
+
+        alias = self.get_unused_name(name)
+        node = self.load_names[module][name] = Name(id=alias, ctx=Load())
+        self.imported_names[name] = qualified_name
+        return node
+
+    def insert_imports(self, node: Module | FunctionDef | AsyncFunctionDef) -> None:
+        """Insert imports needed by injected code."""
+        if not self.load_names:
+            return
+
+        # Insert imports after any "from __future__ ..." imports and any docstring
+        for modulename, names in self.load_names.items():
+            aliases = [
+                alias(orig_name, new_name.id if orig_name != new_name.id else None)
+                for orig_name, new_name in sorted(names.items())
+            ]
+            node.body.insert(self.code_inject_index, ImportFrom(modulename, aliases, 0))
+
+    def name_matches(self, expression: expr | Expr | None, *names: str) -> bool:
+        if expression is None:
+            return False
+
+        path: list[str] = []
+        top_expression = (
+            expression.value if isinstance(expression, Expr) else expression
+        )
+
+        if isinstance(top_expression, Subscript):
+            top_expression = top_expression.value
+        elif isinstance(top_expression, Call):
+            top_expression = top_expression.func
+
+        while isinstance(top_expression, Attribute):
+            path.insert(0, top_expression.attr)
+            top_expression = top_expression.value
+
+        if not isinstance(top_expression, Name):
+            return False
+
+        if top_expression.id in self.imported_names:
+            translated = self.imported_names[top_expression.id]
+        elif hasattr(builtins, top_expression.id):
+            translated = "builtins." + top_expression.id
+        else:
+            translated = top_expression.id
+
+        path.insert(0, translated)
+        joined_path = ".".join(path)
+        if joined_path in names:
+            return True
+        elif self.parent:
+            return self.parent.name_matches(expression, *names)
+        else:
+            return False
+
+    def get_config_keywords(self) -> list[keyword]:
+        if self.parent and isinstance(self.parent.node, ClassDef):
+            overrides = self.parent.configuration_overrides.copy()
+        else:
+            overrides = {}
+
+        overrides.update(self.configuration_overrides)
+        return [keyword(key, value) for key, value in overrides.items()]
+
+
+class NameCollector(NodeVisitor):
+    def __init__(self) -> None:
+        self.names: set[str] = set()
+
+    def visit_Import(self, node: Import) -> None:
+        for name in node.names:
+            self.names.add(name.asname or name.name)
+
+    def visit_ImportFrom(self, node: ImportFrom) -> None:
+        for name in node.names:
+            self.names.add(name.asname or name.name)
+
+    def visit_Assign(self, node: Assign) -> None:
+        for target in node.targets:
+            if isinstance(target, Name):
+                self.names.add(target.id)
+
+    def visit_NamedExpr(self, node: NamedExpr) -> Any:
+        if isinstance(node.target, Name):
+            self.names.add(node.target.id)
+
+    def visit_FunctionDef(self, node: FunctionDef) -> None:
+        pass
+
+    def visit_ClassDef(self, node: ClassDef) -> None:
+        pass
+
+
+class GeneratorDetector(NodeVisitor):
+    """Detects if a function node is a generator function."""
+
+    contains_yields: bool = False
+    in_root_function: bool = False
+
+    def visit_Yield(self, node: Yield) -> Any:
+        self.contains_yields = True
+
+    def visit_YieldFrom(self, node: YieldFrom) -> Any:
+        self.contains_yields = True
+
+    def visit_ClassDef(self, node: ClassDef) -> Any:
+        pass
+
+    def visit_FunctionDef(self, node: FunctionDef | AsyncFunctionDef) -> Any:
+        if not self.in_root_function:
+            self.in_root_function = True
+            self.generic_visit(node)
+            self.in_root_function = False
+
+    def visit_AsyncFunctionDef(self, node: AsyncFunctionDef) -> Any:
+        self.visit_FunctionDef(node)
+
+
+class AnnotationTransformer(NodeTransformer):
+    type_substitutions: ClassVar[dict[str, tuple[str, str]]] = {
+        "builtins.dict": ("typing", "Dict"),
+        "builtins.list": ("typing", "List"),
+        "builtins.tuple": ("typing", "Tuple"),
+        "builtins.set": ("typing", "Set"),
+        "builtins.frozenset": ("typing", "FrozenSet"),
+    }
+
+    def __init__(self, transformer: TypeguardTransformer):
+        self.transformer = transformer
+        self._memo = transformer._memo
+        self._level = 0
+
+    def visit(self, node: AST) -> Any:
+        # Don't process Literals
+        if isinstance(node, expr) and self._memo.name_matches(node, *literal_names):
+            return node
+
+        self._level += 1
+        new_node = super().visit(node)
+        self._level -= 1
+
+        if isinstance(new_node, Expression) and not hasattr(new_node, "body"):
+            return None
+
+        # Return None if this new node matches a variation of typing.Any
+        if (
+            self._level == 0
+            and isinstance(new_node, expr)
+            and self._memo.name_matches(new_node, *anytype_names)
+        ):
+            return None
+
+        return new_node
+
+    def visit_BinOp(self, node: BinOp) -> Any:
+        self.generic_visit(node)
+
+        if isinstance(node.op, BitOr):
+            # If either branch of the BinOp has been transformed to `None`, it means
+            # that a type in the union was ignored, so the entire annotation should e
+            # ignored
+            if not hasattr(node, "left") or not hasattr(node, "right"):
+                return None
+
+            # Return Any if either side is Any
+            if self._memo.name_matches(node.left, *anytype_names):
+                return node.left
+            elif self._memo.name_matches(node.right, *anytype_names):
+                return node.right
+
+            if sys.version_info < (3, 10):
+                union_name = self.transformer._get_import("typing", "Union")
+                return Subscript(
+                    value=union_name,
+                    slice=Index(
+                        Tuple(elts=[node.left, node.right], ctx=Load()), ctx=Load()
+                    ),
+                    ctx=Load(),
+                )
+
+        return node
+
+    def visit_Attribute(self, node: Attribute) -> Any:
+        if self._memo.is_ignored_name(node):
+            return None
+
+        return node
+
+    def visit_Subscript(self, node: Subscript) -> Any:
+        if self._memo.is_ignored_name(node.value):
+            return None
+
+        # The subscript of typing(_extensions).Literal can be any arbitrary string, so
+        # don't try to evaluate it as code
+        if node.slice:
+            if isinstance(node.slice, Index):
+                # Python 3.8
+                slice_value = node.slice.value  # type: ignore[attr-defined]
+            else:
+                slice_value = node.slice
+
+            if isinstance(slice_value, Tuple):
+                if self._memo.name_matches(node.value, *annotated_names):
+                    # Only treat the first argument to typing.Annotated as a potential
+                    # forward reference
+                    items = cast(
+                        typing.List[expr],
+                        [self.visit(slice_value.elts[0])] + slice_value.elts[1:],
+                    )
+                else:
+                    items = cast(
+                        typing.List[expr],
+                        [self.visit(item) for item in slice_value.elts],
+                    )
+
+                # If this is a Union and any of the items is Any, erase the entire
+                # annotation
+                if self._memo.name_matches(node.value, "typing.Union") and any(
+                    item is None
+                    or (
+                        isinstance(item, expr)
+                        and self._memo.name_matches(item, *anytype_names)
+                    )
+                    for item in items
+                ):
+                    return None
+
+                # If all items in the subscript were Any, erase the subscript entirely
+                if all(item is None for item in items):
+                    return node.value
+
+                for index, item in enumerate(items):
+                    if item is None:
+                        items[index] = self.transformer._get_import("typing", "Any")
+
+                slice_value.elts = items
+            else:
+                self.generic_visit(node)
+
+                # If the transformer erased the slice entirely, just return the node
+                # value without the subscript (unless it's Optional, in which case erase
+                # the node entirely
+                if self._memo.name_matches(
+                    node.value, "typing.Optional"
+                ) and not hasattr(node, "slice"):
+                    return None
+                if sys.version_info >= (3, 9) and not hasattr(node, "slice"):
+                    return node.value
+                elif sys.version_info < (3, 9) and not hasattr(node.slice, "value"):
+                    return node.value
+
+        return node
+
+    def visit_Name(self, node: Name) -> Any:
+        if self._memo.is_ignored_name(node):
+            return None
+
+        if sys.version_info < (3, 9):
+            for typename, substitute in self.type_substitutions.items():
+                if self._memo.name_matches(node, typename):
+                    new_node = self.transformer._get_import(*substitute)
+                    return copy_location(new_node, node)
+
+        return node
+
+    def visit_Call(self, node: Call) -> Any:
+        # Don't recurse into calls
+        return node
+
+    def visit_Constant(self, node: Constant) -> Any:
+        if isinstance(node.value, str):
+            expression = ast.parse(node.value, mode="eval")
+            new_node = self.visit(expression)
+            if new_node:
+                return copy_location(new_node.body, node)
+            else:
+                return None
+
+        return node
+
+
+class TypeguardTransformer(NodeTransformer):
+    def __init__(
+        self, target_path: Sequence[str] | None = None, target_lineno: int | None = None
+    ) -> None:
+        self._target_path = tuple(target_path) if target_path else None
+        self._memo = self._module_memo = TransformMemo(None, None, ())
+        self.names_used_in_annotations: set[str] = set()
+        self.target_node: FunctionDef | AsyncFunctionDef | None = None
+        self.target_lineno = target_lineno
+
+    def generic_visit(self, node: AST) -> AST:
+        has_non_empty_body_initially = bool(getattr(node, "body", None))
+        initial_type = type(node)
+
+        node = super().generic_visit(node)
+
+        if (
+            type(node) is initial_type
+            and has_non_empty_body_initially
+            and hasattr(node, "body")
+            and not node.body
+        ):
+            # If we have still the same node type after transformation
+            # but we've optimised it's body away, we add a `pass` statement.
+            node.body = [Pass()]
+
+        return node
+
+    @contextmanager
+    def _use_memo(
+        self, node: ClassDef | FunctionDef | AsyncFunctionDef
+    ) -> Generator[None, Any, None]:
+        new_memo = TransformMemo(node, self._memo, self._memo.path + (node.name,))
+        old_memo = self._memo
+        self._memo = new_memo
+
+        if isinstance(node, (FunctionDef, AsyncFunctionDef)):
+            new_memo.should_instrument = (
+                self._target_path is None or new_memo.path == self._target_path
+            )
+            if new_memo.should_instrument:
+                # Check if the function is a generator function
+                detector = GeneratorDetector()
+                detector.visit(node)
+
+                # Extract yield, send and return types where possible from a subscripted
+                # annotation like Generator[int, str, bool]
+                return_annotation = deepcopy(node.returns)
+                if detector.contains_yields and new_memo.name_matches(
+                    return_annotation, *generator_names
+                ):
+                    if isinstance(return_annotation, Subscript):
+                        annotation_slice = return_annotation.slice
+
+                        # Python < 3.9
+                        if isinstance(annotation_slice, Index):
+                            annotation_slice = (
+                                annotation_slice.value  # type: ignore[attr-defined]
+                            )
+
+                        if isinstance(annotation_slice, Tuple):
+                            items = annotation_slice.elts
+                        else:
+                            items = [annotation_slice]
+
+                        if len(items) > 0:
+                            new_memo.yield_annotation = self._convert_annotation(
+                                items[0]
+                            )
+
+                        if len(items) > 1:
+                            new_memo.send_annotation = self._convert_annotation(
+                                items[1]
+                            )
+
+                        if len(items) > 2:
+                            new_memo.return_annotation = self._convert_annotation(
+                                items[2]
+                            )
+                else:
+                    new_memo.return_annotation = self._convert_annotation(
+                        return_annotation
+                    )
+
+        if isinstance(node, AsyncFunctionDef):
+            new_memo.is_async = True
+
+        yield
+        self._memo = old_memo
+
+    def _get_import(self, module: str, name: str) -> Name:
+        memo = self._memo if self._target_path else self._module_memo
+        return memo.get_import(module, name)
+
+    @overload
+    def _convert_annotation(self, annotation: None) -> None: ...
+
+    @overload
+    def _convert_annotation(self, annotation: expr) -> expr: ...
+
+    def _convert_annotation(self, annotation: expr | None) -> expr | None:
+        if annotation is None:
+            return None
+
+        # Convert PEP 604 unions (x | y) and generic built-in collections where
+        # necessary, and undo forward references
+        new_annotation = cast(expr, AnnotationTransformer(self).visit(annotation))
+        if isinstance(new_annotation, expr):
+            new_annotation = ast.copy_location(new_annotation, annotation)
+
+            # Store names used in the annotation
+            names = {node.id for node in walk(new_annotation) if isinstance(node, Name)}
+            self.names_used_in_annotations.update(names)
+
+        return new_annotation
+
+    def visit_Name(self, node: Name) -> Name:
+        self._memo.local_names.add(node.id)
+        return node
+
+    def visit_Module(self, node: Module) -> Module:
+        self._module_memo = self._memo = TransformMemo(node, None, ())
+        self.generic_visit(node)
+        self._module_memo.insert_imports(node)
+
+        fix_missing_locations(node)
+        return node
+
+    def visit_Import(self, node: Import) -> Import:
+        for name in node.names:
+            self._memo.local_names.add(name.asname or name.name)
+            self._memo.imported_names[name.asname or name.name] = name.name
+
+        return node
+
+    def visit_ImportFrom(self, node: ImportFrom) -> ImportFrom:
+        for name in node.names:
+            if name.name != "*":
+                alias = name.asname or name.name
+                self._memo.local_names.add(alias)
+                self._memo.imported_names[alias] = f"{node.module}.{name.name}"
+
+        return node
+
+    def visit_ClassDef(self, node: ClassDef) -> ClassDef | None:
+        self._memo.local_names.add(node.name)
+
+        # Eliminate top level classes not belonging to the target path
+        if (
+            self._target_path is not None
+            and not self._memo.path
+            and node.name != self._target_path[0]
+        ):
+            return None
+
+        with self._use_memo(node):
+            for decorator in node.decorator_list.copy():
+                if self._memo.name_matches(decorator, "typeguard.typechecked"):
+                    # Remove the decorator to prevent duplicate instrumentation
+                    node.decorator_list.remove(decorator)
+
+                    # Store any configuration overrides
+                    if isinstance(decorator, Call) and decorator.keywords:
+                        self._memo.configuration_overrides.update(
+                            {kw.arg: kw.value for kw in decorator.keywords if kw.arg}
+                        )
+
+            self.generic_visit(node)
+            return node
+
+    def visit_FunctionDef(
+        self, node: FunctionDef | AsyncFunctionDef
+    ) -> FunctionDef | AsyncFunctionDef | None:
+        """
+        Injects type checks for function arguments, and for a return of None if the
+        function is annotated to return something else than Any or None, and the body
+        ends without an explicit "return".
+
+        """
+        self._memo.local_names.add(node.name)
+
+        # Eliminate top level functions not belonging to the target path
+        if (
+            self._target_path is not None
+            and not self._memo.path
+            and node.name != self._target_path[0]
+        ):
+            return None
+
+        # Skip instrumentation if we're instrumenting the whole module and the function
+        # contains either @no_type_check or @typeguard_ignore
+        if self._target_path is None:
+            for decorator in node.decorator_list:
+                if self._memo.name_matches(decorator, *ignore_decorators):
+                    return node
+
+        with self._use_memo(node):
+            arg_annotations: dict[str, Any] = {}
+            if self._target_path is None or self._memo.path == self._target_path:
+                # Find line number we're supposed to match against
+                if node.decorator_list:
+                    first_lineno = node.decorator_list[0].lineno
+                else:
+                    first_lineno = node.lineno
+
+                for decorator in node.decorator_list.copy():
+                    if self._memo.name_matches(decorator, "typing.overload"):
+                        # Remove overloads entirely
+                        return None
+                    elif self._memo.name_matches(decorator, "typeguard.typechecked"):
+                        # Remove the decorator to prevent duplicate instrumentation
+                        node.decorator_list.remove(decorator)
+
+                        # Store any configuration overrides
+                        if isinstance(decorator, Call) and decorator.keywords:
+                            self._memo.configuration_overrides = {
+                                kw.arg: kw.value for kw in decorator.keywords if kw.arg
+                            }
+
+                if self.target_lineno == first_lineno:
+                    assert self.target_node is None
+                    self.target_node = node
+                    if node.decorator_list:
+                        self.target_lineno = node.decorator_list[0].lineno
+                    else:
+                        self.target_lineno = node.lineno
+
+                all_args = node.args.args + node.args.kwonlyargs + node.args.posonlyargs
+
+                # Ensure that any type shadowed by the positional or keyword-only
+                # argument names are ignored in this function
+                for arg in all_args:
+                    self._memo.ignored_names.add(arg.arg)
+
+                # Ensure that any type shadowed by the variable positional argument name
+                # (e.g. "args" in *args) is ignored this function
+                if node.args.vararg:
+                    self._memo.ignored_names.add(node.args.vararg.arg)
+
+                # Ensure that any type shadowed by the variable keywrod argument name
+                # (e.g. "kwargs" in *kwargs) is ignored this function
+                if node.args.kwarg:
+                    self._memo.ignored_names.add(node.args.kwarg.arg)
+
+                for arg in all_args:
+                    annotation = self._convert_annotation(deepcopy(arg.annotation))
+                    if annotation:
+                        arg_annotations[arg.arg] = annotation
+
+                if node.args.vararg:
+                    annotation_ = self._convert_annotation(node.args.vararg.annotation)
+                    if annotation_:
+                        if sys.version_info >= (3, 9):
+                            container = Name("tuple", ctx=Load())
+                        else:
+                            container = self._get_import("typing", "Tuple")
+
+                        subscript_slice: Tuple | Index = Tuple(
+                            [
+                                annotation_,
+                                Constant(Ellipsis),
+                            ],
+                            ctx=Load(),
+                        )
+                        if sys.version_info < (3, 9):
+                            subscript_slice = Index(subscript_slice, ctx=Load())
+
+                        arg_annotations[node.args.vararg.arg] = Subscript(
+                            container, subscript_slice, ctx=Load()
+                        )
+
+                if node.args.kwarg:
+                    annotation_ = self._convert_annotation(node.args.kwarg.annotation)
+                    if annotation_:
+                        if sys.version_info >= (3, 9):
+                            container = Name("dict", ctx=Load())
+                        else:
+                            container = self._get_import("typing", "Dict")
+
+                        subscript_slice = Tuple(
+                            [
+                                Name("str", ctx=Load()),
+                                annotation_,
+                            ],
+                            ctx=Load(),
+                        )
+                        if sys.version_info < (3, 9):
+                            subscript_slice = Index(subscript_slice, ctx=Load())
+
+                        arg_annotations[node.args.kwarg.arg] = Subscript(
+                            container, subscript_slice, ctx=Load()
+                        )
+
+                if arg_annotations:
+                    self._memo.variable_annotations.update(arg_annotations)
+
+            self.generic_visit(node)
+
+            if arg_annotations:
+                annotations_dict = Dict(
+                    keys=[Constant(key) for key in arg_annotations.keys()],
+                    values=[
+                        Tuple([Name(key, ctx=Load()), annotation], ctx=Load())
+                        for key, annotation in arg_annotations.items()
+                    ],
+                )
+                func_name = self._get_import(
+                    "typeguard._functions", "check_argument_types"
+                )
+                args = [
+                    self._memo.joined_path,
+                    annotations_dict,
+                    self._memo.get_memo_name(),
+                ]
+                node.body.insert(
+                    self._memo.code_inject_index, Expr(Call(func_name, args, []))
+                )
+
+            # Add a checked "return None" to the end if there's no explicit return
+            # Skip if the return annotation is None or Any
+            if (
+                self._memo.return_annotation
+                and (not self._memo.is_async or not self._memo.has_yield_expressions)
+                and not isinstance(node.body[-1], Return)
+                and (
+                    not isinstance(self._memo.return_annotation, Constant)
+                    or self._memo.return_annotation.value is not None
+                )
+            ):
+                func_name = self._get_import(
+                    "typeguard._functions", "check_return_type"
+                )
+                return_node = Return(
+                    Call(
+                        func_name,
+                        [
+                            self._memo.joined_path,
+                            Constant(None),
+                            self._memo.return_annotation,
+                            self._memo.get_memo_name(),
+                        ],
+                        [],
+                    )
+                )
+
+                # Replace a placeholder "pass" at the end
+                if isinstance(node.body[-1], Pass):
+                    copy_location(return_node, node.body[-1])
+                    del node.body[-1]
+
+                node.body.append(return_node)
+
+            # Insert code to create the call memo, if it was ever needed for this
+            # function
+            if self._memo.memo_var_name:
+                memo_kwargs: dict[str, Any] = {}
+                if self._memo.parent and isinstance(self._memo.parent.node, ClassDef):
+                    for decorator in node.decorator_list:
+                        if (
+                            isinstance(decorator, Name)
+                            and decorator.id == "staticmethod"
+                        ):
+                            break
+                        elif (
+                            isinstance(decorator, Name)
+                            and decorator.id == "classmethod"
+                        ):
+                            memo_kwargs["self_type"] = Name(
+                                id=node.args.args[0].arg, ctx=Load()
+                            )
+                            break
+                    else:
+                        if node.args.args:
+                            if node.name == "__new__":
+                                memo_kwargs["self_type"] = Name(
+                                    id=node.args.args[0].arg, ctx=Load()
+                                )
+                            else:
+                                memo_kwargs["self_type"] = Attribute(
+                                    Name(id=node.args.args[0].arg, ctx=Load()),
+                                    "__class__",
+                                    ctx=Load(),
+                                )
+
+                # Construct the function reference
+                # Nested functions get special treatment: the function name is added
+                # to free variables (and the closure of the resulting function)
+                names: list[str] = [node.name]
+                memo = self._memo.parent
+                while memo:
+                    if isinstance(memo.node, (FunctionDef, AsyncFunctionDef)):
+                        # This is a nested function. Use the function name as-is.
+                        del names[:-1]
+                        break
+                    elif not isinstance(memo.node, ClassDef):
+                        break
+
+                    names.insert(0, memo.node.name)
+                    memo = memo.parent
+
+                config_keywords = self._memo.get_config_keywords()
+                if config_keywords:
+                    memo_kwargs["config"] = Call(
+                        self._get_import("dataclasses", "replace"),
+                        [self._get_import("typeguard._config", "global_config")],
+                        config_keywords,
+                    )
+
+                self._memo.memo_var_name.id = self._memo.get_unused_name("memo")
+                memo_store_name = Name(id=self._memo.memo_var_name.id, ctx=Store())
+                globals_call = Call(Name(id="globals", ctx=Load()), [], [])
+                locals_call = Call(Name(id="locals", ctx=Load()), [], [])
+                memo_expr = Call(
+                    self._get_import("typeguard", "TypeCheckMemo"),
+                    [globals_call, locals_call],
+                    [keyword(key, value) for key, value in memo_kwargs.items()],
+                )
+                node.body.insert(
+                    self._memo.code_inject_index,
+                    Assign([memo_store_name], memo_expr),
+                )
+
+                self._memo.insert_imports(node)
+
+                # Special case the __new__() method to create a local alias from the
+                # class name to the first argument (usually "cls")
+                if (
+                    isinstance(node, FunctionDef)
+                    and node.args
+                    and self._memo.parent is not None
+                    and isinstance(self._memo.parent.node, ClassDef)
+                    and node.name == "__new__"
+                ):
+                    first_args_expr = Name(node.args.args[0].arg, ctx=Load())
+                    cls_name = Name(self._memo.parent.node.name, ctx=Store())
+                    node.body.insert(
+                        self._memo.code_inject_index,
+                        Assign([cls_name], first_args_expr),
+                    )
+
+                # Rmove any placeholder "pass" at the end
+                if isinstance(node.body[-1], Pass):
+                    del node.body[-1]
+
+        return node
+
+    def visit_AsyncFunctionDef(
+        self, node: AsyncFunctionDef
+    ) -> FunctionDef | AsyncFunctionDef | None:
+        return self.visit_FunctionDef(node)
+
+    def visit_Return(self, node: Return) -> Return:
+        """This injects type checks into "return" statements."""
+        self.generic_visit(node)
+        if (
+            self._memo.return_annotation
+            and self._memo.should_instrument
+            and not self._memo.is_ignored_name(self._memo.return_annotation)
+        ):
+            func_name = self._get_import("typeguard._functions", "check_return_type")
+            old_node = node
+            retval = old_node.value or Constant(None)
+            node = Return(
+                Call(
+                    func_name,
+                    [
+                        self._memo.joined_path,
+                        retval,
+                        self._memo.return_annotation,
+                        self._memo.get_memo_name(),
+                    ],
+                    [],
+                )
+            )
+            copy_location(node, old_node)
+
+        return node
+
+    def visit_Yield(self, node: Yield) -> Yield | Call:
+        """
+        This injects type checks into "yield" expressions, checking both the yielded
+        value and the value sent back to the generator, when appropriate.
+
+        """
+        self._memo.has_yield_expressions = True
+        self.generic_visit(node)
+
+        if (
+            self._memo.yield_annotation
+            and self._memo.should_instrument
+            and not self._memo.is_ignored_name(self._memo.yield_annotation)
+        ):
+            func_name = self._get_import("typeguard._functions", "check_yield_type")
+            yieldval = node.value or Constant(None)
+            node.value = Call(
+                func_name,
+                [
+                    self._memo.joined_path,
+                    yieldval,
+                    self._memo.yield_annotation,
+                    self._memo.get_memo_name(),
+                ],
+                [],
+            )
+
+        if (
+            self._memo.send_annotation
+            and self._memo.should_instrument
+            and not self._memo.is_ignored_name(self._memo.send_annotation)
+        ):
+            func_name = self._get_import("typeguard._functions", "check_send_type")
+            old_node = node
+            call_node = Call(
+                func_name,
+                [
+                    self._memo.joined_path,
+                    old_node,
+                    self._memo.send_annotation,
+                    self._memo.get_memo_name(),
+                ],
+                [],
+            )
+            copy_location(call_node, old_node)
+            return call_node
+
+        return node
+
+    def visit_AnnAssign(self, node: AnnAssign) -> Any:
+        """
+        This injects a type check into a local variable annotation-assignment within a
+        function body.
+
+        """
+        self.generic_visit(node)
+
+        if (
+            isinstance(self._memo.node, (FunctionDef, AsyncFunctionDef))
+            and node.annotation
+            and isinstance(node.target, Name)
+        ):
+            self._memo.ignored_names.add(node.target.id)
+            annotation = self._convert_annotation(deepcopy(node.annotation))
+            if annotation:
+                self._memo.variable_annotations[node.target.id] = annotation
+                if node.value:
+                    func_name = self._get_import(
+                        "typeguard._functions", "check_variable_assignment"
+                    )
+                    node.value = Call(
+                        func_name,
+                        [
+                            node.value,
+                            Constant(node.target.id),
+                            annotation,
+                            self._memo.get_memo_name(),
+                        ],
+                        [],
+                    )
+
+        return node
+
+    def visit_Assign(self, node: Assign) -> Any:
+        """
+        This injects a type check into a local variable assignment within a function
+        body. The variable must have been annotated earlier in the function body.
+
+        """
+        self.generic_visit(node)
+
+        # Only instrument function-local assignments
+        if isinstance(self._memo.node, (FunctionDef, AsyncFunctionDef)):
+            targets: list[dict[Constant, expr | None]] = []
+            check_required = False
+            for target in node.targets:
+                elts: Sequence[expr]
+                if isinstance(target, Name):
+                    elts = [target]
+                elif isinstance(target, Tuple):
+                    elts = target.elts
+                else:
+                    continue
+
+                annotations_: dict[Constant, expr | None] = {}
+                for exp in elts:
+                    prefix = ""
+                    if isinstance(exp, Starred):
+                        exp = exp.value
+                        prefix = "*"
+
+                    if isinstance(exp, Name):
+                        self._memo.ignored_names.add(exp.id)
+                        name = prefix + exp.id
+                        annotation = self._memo.variable_annotations.get(exp.id)
+                        if annotation:
+                            annotations_[Constant(name)] = annotation
+                            check_required = True
+                        else:
+                            annotations_[Constant(name)] = None
+
+                targets.append(annotations_)
+
+            if check_required:
+                # Replace missing annotations with typing.Any
+                for item in targets:
+                    for key, expression in item.items():
+                        if expression is None:
+                            item[key] = self._get_import("typing", "Any")
+
+                if len(targets) == 1 and len(targets[0]) == 1:
+                    func_name = self._get_import(
+                        "typeguard._functions", "check_variable_assignment"
+                    )
+                    target_varname = next(iter(targets[0]))
+                    node.value = Call(
+                        func_name,
+                        [
+                            node.value,
+                            target_varname,
+                            targets[0][target_varname],
+                            self._memo.get_memo_name(),
+                        ],
+                        [],
+                    )
+                elif targets:
+                    func_name = self._get_import(
+                        "typeguard._functions", "check_multi_variable_assignment"
+                    )
+                    targets_arg = List(
+                        [
+                            Dict(keys=list(target), values=list(target.values()))
+                            for target in targets
+                        ],
+                        ctx=Load(),
+                    )
+                    node.value = Call(
+                        func_name,
+                        [node.value, targets_arg, self._memo.get_memo_name()],
+                        [],
+                    )
+
+        return node
+
+    def visit_NamedExpr(self, node: NamedExpr) -> Any:
+        """This injects a type check into an assignment expression (a := foo())."""
+        self.generic_visit(node)
+
+        # Only instrument function-local assignments
+        if isinstance(self._memo.node, (FunctionDef, AsyncFunctionDef)) and isinstance(
+            node.target, Name
+        ):
+            self._memo.ignored_names.add(node.target.id)
+
+            # Bail out if no matching annotation is found
+            annotation = self._memo.variable_annotations.get(node.target.id)
+            if annotation is None:
+                return node
+
+            func_name = self._get_import(
+                "typeguard._functions", "check_variable_assignment"
+            )
+            node.value = Call(
+                func_name,
+                [
+                    node.value,
+                    Constant(node.target.id),
+                    annotation,
+                    self._memo.get_memo_name(),
+                ],
+                [],
+            )
+
+        return node
+
+    def visit_AugAssign(self, node: AugAssign) -> Any:
+        """
+        This injects a type check into an augmented assignment expression (a += 1).
+
+        """
+        self.generic_visit(node)
+
+        # Only instrument function-local assignments
+        if isinstance(self._memo.node, (FunctionDef, AsyncFunctionDef)) and isinstance(
+            node.target, Name
+        ):
+            # Bail out if no matching annotation is found
+            annotation = self._memo.variable_annotations.get(node.target.id)
+            if annotation is None:
+                return node
+
+            # Bail out if the operator is not found (newer Python version?)
+            try:
+                operator_func_name = aug_assign_functions[node.op.__class__]
+            except KeyError:
+                return node
+
+            operator_func = self._get_import("operator", operator_func_name)
+            operator_call = Call(
+                operator_func, [Name(node.target.id, ctx=Load()), node.value], []
+            )
+            check_call = Call(
+                self._get_import("typeguard._functions", "check_variable_assignment"),
+                [
+                    operator_call,
+                    Constant(node.target.id),
+                    annotation,
+                    self._memo.get_memo_name(),
+                ],
+                [],
+            )
+            return Assign(targets=[node.target], value=check_call)
+
+        return node
+
+    def visit_If(self, node: If) -> Any:
+        """
+        This blocks names from being collected from a module-level
+        "if typing.TYPE_CHECKING:" block, so that they won't be type checked.
+
+        """
+        self.generic_visit(node)
+
+        if (
+            self._memo is self._module_memo
+            and isinstance(node.test, Name)
+            and self._memo.name_matches(node.test, "typing.TYPE_CHECKING")
+        ):
+            collector = NameCollector()
+            collector.visit(node)
+            self._memo.ignored_names.update(collector.names)
+
+        return node
diff --git a/lib/typeguard/_union_transformer.py b/lib/typeguard/_union_transformer.py
new file mode 100644
index 00000000..19617e6a
--- /dev/null
+++ b/lib/typeguard/_union_transformer.py
@@ -0,0 +1,55 @@
+"""
+Transforms lazily evaluated PEP 604 unions into typing.Unions, for compatibility with
+Python versions older than 3.10.
+"""
+
+from __future__ import annotations
+
+from ast import (
+    BinOp,
+    BitOr,
+    Index,
+    Load,
+    Name,
+    NodeTransformer,
+    Subscript,
+    fix_missing_locations,
+    parse,
+)
+from ast import Tuple as ASTTuple
+from types import CodeType
+from typing import Any, Dict, FrozenSet, List, Set, Tuple, Union
+
+type_substitutions = {
+    "dict": Dict,
+    "list": List,
+    "tuple": Tuple,
+    "set": Set,
+    "frozenset": FrozenSet,
+    "Union": Union,
+}
+
+
+class UnionTransformer(NodeTransformer):
+    def __init__(self, union_name: Name | None = None):
+        self.union_name = union_name or Name(id="Union", ctx=Load())
+
+    def visit_BinOp(self, node: BinOp) -> Any:
+        self.generic_visit(node)
+        if isinstance(node.op, BitOr):
+            return Subscript(
+                value=self.union_name,
+                slice=Index(
+                    ASTTuple(elts=[node.left, node.right], ctx=Load()), ctx=Load()
+                ),
+                ctx=Load(),
+            )
+
+        return node
+
+
+def compile_type_hint(hint: str) -> CodeType:
+    parsed = parse(hint, "<string>", "eval")
+    UnionTransformer().visit(parsed)
+    fix_missing_locations(parsed)
+    return compile(parsed, "<string>", "eval", flags=0)
diff --git a/lib/typeguard/_utils.py b/lib/typeguard/_utils.py
new file mode 100644
index 00000000..96818fd2
--- /dev/null
+++ b/lib/typeguard/_utils.py
@@ -0,0 +1,163 @@
+from __future__ import annotations
+
+import inspect
+import sys
+from importlib import import_module
+from inspect import currentframe
+from types import CodeType, FrameType, FunctionType
+from typing import TYPE_CHECKING, Any, Callable, ForwardRef, Union, cast, final
+from weakref import WeakValueDictionary
+
+if TYPE_CHECKING:
+    from ._memo import TypeCheckMemo
+
+if sys.version_info >= (3, 10):
+    from typing import get_args, get_origin
+
+    def evaluate_forwardref(forwardref: ForwardRef, memo: TypeCheckMemo) -> Any:
+        return forwardref._evaluate(memo.globals, memo.locals, frozenset())
+
+else:
+    from typing_extensions import get_args, get_origin
+
+    evaluate_extra_args: tuple[frozenset[Any], ...] = (
+        (frozenset(),) if sys.version_info >= (3, 9) else ()
+    )
+
+    def evaluate_forwardref(forwardref: ForwardRef, memo: TypeCheckMemo) -> Any:
+        from ._union_transformer import compile_type_hint, type_substitutions
+
+        if not forwardref.__forward_evaluated__:
+            forwardref.__forward_code__ = compile_type_hint(forwardref.__forward_arg__)
+
+        try:
+            return forwardref._evaluate(memo.globals, memo.locals, *evaluate_extra_args)
+        except NameError:
+            if sys.version_info < (3, 10):
+                # Try again, with the type substitutions (list -> List etc.) in place
+                new_globals = memo.globals.copy()
+                new_globals.setdefault("Union", Union)
+                if sys.version_info < (3, 9):
+                    new_globals.update(type_substitutions)
+
+                return forwardref._evaluate(
+                    new_globals, memo.locals or new_globals, *evaluate_extra_args
+                )
+
+            raise
+
+
+_functions_map: WeakValueDictionary[CodeType, FunctionType] = WeakValueDictionary()
+
+
+def get_type_name(type_: Any) -> str:
+    name: str
+    for attrname in "__name__", "_name", "__forward_arg__":
+        candidate = getattr(type_, attrname, None)
+        if isinstance(candidate, str):
+            name = candidate
+            break
+    else:
+        origin = get_origin(type_)
+        candidate = getattr(origin, "_name", None)
+        if candidate is None:
+            candidate = type_.__class__.__name__.strip("_")
+
+        if isinstance(candidate, str):
+            name = candidate
+        else:
+            return "(unknown)"
+
+    args = get_args(type_)
+    if args:
+        if name == "Literal":
+            formatted_args = ", ".join(repr(arg) for arg in args)
+        else:
+            formatted_args = ", ".join(get_type_name(arg) for arg in args)
+
+        name += f"[{formatted_args}]"
+
+    module = getattr(type_, "__module__", None)
+    if module and module not in (None, "typing", "typing_extensions", "builtins"):
+        name = module + "." + name
+
+    return name
+
+
+def qualified_name(obj: Any, *, add_class_prefix: bool = False) -> str:
+    """
+    Return the qualified name (e.g. package.module.Type) for the given object.
+
+    Builtins and types from the :mod:`typing` package get special treatment by having
+    the module name stripped from the generated name.
+
+    """
+    if obj is None:
+        return "None"
+    elif inspect.isclass(obj):
+        prefix = "class " if add_class_prefix else ""
+        type_ = obj
+    else:
+        prefix = ""
+        type_ = type(obj)
+
+    module = type_.__module__
+    qualname = type_.__qualname__
+    name = qualname if module in ("typing", "builtins") else f"{module}.{qualname}"
+    return prefix + name
+
+
+def function_name(func: Callable[..., Any]) -> str:
+    """
+    Return the qualified name of the given function.
+
+    Builtins and types from the :mod:`typing` package get special treatment by having
+    the module name stripped from the generated name.
+
+    """
+    # For partial functions and objects with __call__ defined, __qualname__ does not
+    # exist
+    module = getattr(func, "__module__", "")
+    qualname = (module + ".") if module not in ("builtins", "") else ""
+    return qualname + getattr(func, "__qualname__", repr(func))
+
+
+def resolve_reference(reference: str) -> Any:
+    modulename, varname = reference.partition(":")[::2]
+    if not modulename or not varname:
+        raise ValueError(f"{reference!r} is not a module:varname reference")
+
+    obj = import_module(modulename)
+    for attr in varname.split("."):
+        obj = getattr(obj, attr)
+
+    return obj
+
+
+def is_method_of(obj: object, cls: type) -> bool:
+    return (
+        inspect.isfunction(obj)
+        and obj.__module__ == cls.__module__
+        and obj.__qualname__.startswith(cls.__qualname__ + ".")
+    )
+
+
+def get_stacklevel() -> int:
+    level = 1
+    frame = cast(FrameType, currentframe()).f_back
+    while frame and frame.f_globals.get("__name__", "").startswith("typeguard."):
+        level += 1
+        frame = frame.f_back
+
+    return level
+
+
+@final
+class Unset:
+    __slots__ = ()
+
+    def __repr__(self) -> str:
+        return "<unset>"
+
+
+unset = Unset()
diff --git a/lib/typeguard/py.typed b/lib/typeguard/py.typed
new file mode 100644
index 00000000..e69de29b
diff --git a/lib/typing_extensions.py b/lib/typing_extensions.py
index f3132ea4..9ccd519c 100644
--- a/lib/typing_extensions.py
+++ b/lib/typing_extensions.py
@@ -147,27 +147,6 @@ class _Sentinel:
 _marker = _Sentinel()
 
 
-def _check_generic(cls, parameters, elen=_marker):
-    """Check correct count for parameters of a generic cls (internal helper).
-    This gives a nice error message in case of count mismatch.
-    """
-    if not elen:
-        raise TypeError(f"{cls} is not a generic class")
-    if elen is _marker:
-        if not hasattr(cls, "__parameters__") or not cls.__parameters__:
-            raise TypeError(f"{cls} is not a generic class")
-        elen = len(cls.__parameters__)
-    alen = len(parameters)
-    if alen != elen:
-        if hasattr(cls, "__parameters__"):
-            parameters = [p for p in cls.__parameters__ if not _is_unpack(p)]
-            num_tv_tuples = sum(isinstance(p, TypeVarTuple) for p in parameters)
-            if (num_tv_tuples > 0) and (alen >= elen - num_tv_tuples):
-                return
-        raise TypeError(f"Too {'many' if alen > elen else 'few'} parameters for {cls};"
-                        f" actual {alen}, expected {elen}")
-
-
 if sys.version_info >= (3, 10):
     def _should_collect_from_parameters(t):
         return isinstance(
@@ -181,27 +160,6 @@ else:
         return isinstance(t, typing._GenericAlias) and not t._special
 
 
-def _collect_type_vars(types, typevar_types=None):
-    """Collect all type variable contained in types in order of
-    first appearance (lexicographic order). For example::
-
-        _collect_type_vars((T, List[S, T])) == (T, S)
-    """
-    if typevar_types is None:
-        typevar_types = typing.TypeVar
-    tvars = []
-    for t in types:
-        if (
-            isinstance(t, typevar_types) and
-            t not in tvars and
-            not _is_unpack(t)
-        ):
-            tvars.append(t)
-        if _should_collect_from_parameters(t):
-            tvars.extend([t for t in t.__parameters__ if t not in tvars])
-    return tuple(tvars)
-
-
 NoReturn = typing.NoReturn
 
 # Some unconstrained type variables.  These are used by the container types.
@@ -834,7 +792,11 @@ def _ensure_subclassable(mro_entries):
     return inner
 
 
-if hasattr(typing, "ReadOnly"):
+# Update this to something like >=3.13.0b1 if and when
+# PEP 728 is implemented in CPython
+_PEP_728_IMPLEMENTED = False
+
+if _PEP_728_IMPLEMENTED:
     # The standard library TypedDict in Python 3.8 does not store runtime information
     # about which (if any) keys are optional.  See https://bugs.python.org/issue38834
     # The standard library TypedDict in Python 3.9.0/1 does not honour the "total"
@@ -845,7 +807,8 @@ if hasattr(typing, "ReadOnly"):
     # Aaaand on 3.12 we add __orig_bases__ to TypedDict
     # to enable better runtime introspection.
     # On 3.13 we deprecate some odd ways of creating TypedDicts.
-    # PEP 705 proposes adding the ReadOnly[] qualifier.
+    # Also on 3.13, PEP 705 adds the ReadOnly[] qualifier.
+    # PEP 728 (still pending) makes more changes.
     TypedDict = typing.TypedDict
     _TypedDictMeta = typing._TypedDictMeta
     is_typeddict = typing.is_typeddict
@@ -1122,15 +1085,15 @@ else:
         return val
 
 
-if hasattr(typing, "Required"):  # 3.11+
+if hasattr(typing, "ReadOnly"):  # 3.13+
     get_type_hints = typing.get_type_hints
-else:  # <=3.10
+else:  # <=3.13
     # replaces _strip_annotations()
     def _strip_extras(t):
         """Strips Annotated, Required and NotRequired from a given type."""
         if isinstance(t, _AnnotatedAlias):
             return _strip_extras(t.__origin__)
-        if hasattr(t, "__origin__") and t.__origin__ in (Required, NotRequired):
+        if hasattr(t, "__origin__") and t.__origin__ in (Required, NotRequired, ReadOnly):
             return _strip_extras(t.__args__[0])
         if isinstance(t, typing._GenericAlias):
             stripped_args = tuple(_strip_extras(a) for a in t.__args__)
@@ -2689,9 +2652,151 @@ else:
 #   counting generic parameters, so that when we subscript a generic,
 #   the runtime doesn't try to substitute the Unpack with the subscripted type.
 if not hasattr(typing, "TypeVarTuple"):
-    typing._collect_type_vars = _collect_type_vars
-    typing._check_generic = _check_generic
+    def _check_generic(cls, parameters, elen=_marker):
+        """Check correct count for parameters of a generic cls (internal helper).
 
+        This gives a nice error message in case of count mismatch.
+        """
+        if not elen:
+            raise TypeError(f"{cls} is not a generic class")
+        if elen is _marker:
+            if not hasattr(cls, "__parameters__") or not cls.__parameters__:
+                raise TypeError(f"{cls} is not a generic class")
+            elen = len(cls.__parameters__)
+        alen = len(parameters)
+        if alen != elen:
+            expect_val = elen
+            if hasattr(cls, "__parameters__"):
+                parameters = [p for p in cls.__parameters__ if not _is_unpack(p)]
+                num_tv_tuples = sum(isinstance(p, TypeVarTuple) for p in parameters)
+                if (num_tv_tuples > 0) and (alen >= elen - num_tv_tuples):
+                    return
+
+                # deal with TypeVarLike defaults
+                # required TypeVarLikes cannot appear after a defaulted one.
+                if alen < elen:
+                    # since we validate TypeVarLike default in _collect_type_vars
+                    # or _collect_parameters we can safely check parameters[alen]
+                    if getattr(parameters[alen], '__default__', None) is not None:
+                        return
+
+                    num_default_tv = sum(getattr(p, '__default__', None)
+                                         is not None for p in parameters)
+
+                    elen -= num_default_tv
+
+                    expect_val = f"at least {elen}"
+
+            things = "arguments" if sys.version_info >= (3, 10) else "parameters"
+            raise TypeError(f"Too {'many' if alen > elen else 'few'} {things}"
+                            f" for {cls}; actual {alen}, expected {expect_val}")
+else:
+    # Python 3.11+
+
+    def _check_generic(cls, parameters, elen):
+        """Check correct count for parameters of a generic cls (internal helper).
+
+        This gives a nice error message in case of count mismatch.
+        """
+        if not elen:
+            raise TypeError(f"{cls} is not a generic class")
+        alen = len(parameters)
+        if alen != elen:
+            expect_val = elen
+            if hasattr(cls, "__parameters__"):
+                parameters = [p for p in cls.__parameters__ if not _is_unpack(p)]
+
+                # deal with TypeVarLike defaults
+                # required TypeVarLikes cannot appear after a defaulted one.
+                if alen < elen:
+                    # since we validate TypeVarLike default in _collect_type_vars
+                    # or _collect_parameters we can safely check parameters[alen]
+                    if getattr(parameters[alen], '__default__', None) is not None:
+                        return
+
+                    num_default_tv = sum(getattr(p, '__default__', None)
+                                         is not None for p in parameters)
+
+                    elen -= num_default_tv
+
+                    expect_val = f"at least {elen}"
+
+            raise TypeError(f"Too {'many' if alen > elen else 'few'} arguments"
+                            f" for {cls}; actual {alen}, expected {expect_val}")
+
+typing._check_generic = _check_generic
+
+# Python 3.11+ _collect_type_vars was renamed to _collect_parameters
+if hasattr(typing, '_collect_type_vars'):
+    def _collect_type_vars(types, typevar_types=None):
+        """Collect all type variable contained in types in order of
+        first appearance (lexicographic order). For example::
+
+            _collect_type_vars((T, List[S, T])) == (T, S)
+        """
+        if typevar_types is None:
+            typevar_types = typing.TypeVar
+        tvars = []
+        # required TypeVarLike cannot appear after TypeVarLike with default
+        default_encountered = False
+        for t in types:
+            if (
+                isinstance(t, typevar_types) and
+                t not in tvars and
+                not _is_unpack(t)
+            ):
+                if getattr(t, '__default__', None) is not None:
+                    default_encountered = True
+                elif default_encountered:
+                    raise TypeError(f'Type parameter {t!r} without a default'
+                                    ' follows type parameter with a default')
+
+                tvars.append(t)
+            if _should_collect_from_parameters(t):
+                tvars.extend([t for t in t.__parameters__ if t not in tvars])
+        return tuple(tvars)
+
+    typing._collect_type_vars = _collect_type_vars
+else:
+    def _collect_parameters(args):
+        """Collect all type variables and parameter specifications in args
+        in order of first appearance (lexicographic order).
+
+        For example::
+
+            assert _collect_parameters((T, Callable[P, T])) == (T, P)
+        """
+        parameters = []
+        # required TypeVarLike cannot appear after TypeVarLike with default
+        default_encountered = False
+        for t in args:
+            if isinstance(t, type):
+                # We don't want __parameters__ descriptor of a bare Python class.
+                pass
+            elif isinstance(t, tuple):
+                # `t` might be a tuple, when `ParamSpec` is substituted with
+                # `[T, int]`, or `[int, *Ts]`, etc.
+                for x in t:
+                    for collected in _collect_parameters([x]):
+                        if collected not in parameters:
+                            parameters.append(collected)
+            elif hasattr(t, '__typing_subst__'):
+                if t not in parameters:
+                    if getattr(t, '__default__', None) is not None:
+                        default_encountered = True
+                    elif default_encountered:
+                        raise TypeError(f'Type parameter {t!r} without a default'
+                                        ' follows type parameter with a default')
+
+                    parameters.append(t)
+            else:
+                for x in getattr(t, '__parameters__', ()):
+                    if x not in parameters:
+                        parameters.append(x)
+
+        return tuple(parameters)
+
+    typing._collect_parameters = _collect_parameters
 
 # Backport typing.NamedTuple as it exists in Python 3.13.
 # In 3.11, the ability to define generic `NamedTuple`s was supported.
diff --git a/plexpy/__init__.py b/plexpy/__init__.py
index 10d153d1..0366fcde 100644
--- a/plexpy/__init__.py
+++ b/plexpy/__init__.py
@@ -13,14 +13,10 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import range
-from future.builtins import str
-
 import ctypes
 import datetime
 import os
-import future.moves.queue as queue
+import queue
 import sqlite3
 import sys
 import subprocess
@@ -39,52 +35,27 @@ from apscheduler.triggers.interval import IntervalTrigger
 from ga4mp import GtagMP
 import pytz
 
-PYTHON2 = sys.version_info[0] == 2
-
-if PYTHON2:
-    import activity_handler
-    import activity_pinger
-    import common
-    import database
-    import datafactory
-    import exporter
-    import helpers
-    import libraries
-    import logger
-    import mobile_app
-    import newsletters
-    import newsletter_handler
-    import notification_handler
-    import notifiers
-    import plex
-    import plextv
-    import users
-    import versioncheck
-    import web_socket
-    import webstart
-    import config
-else:
-    from plexpy import activity_handler
-    from plexpy import activity_pinger
-    from plexpy import common
-    from plexpy import database
-    from plexpy import datafactory
-    from plexpy import exporter
-    from plexpy import helpers
-    from plexpy import libraries
-    from plexpy import logger
-    from plexpy import mobile_app
-    from plexpy import newsletters
-    from plexpy import newsletter_handler
-    from plexpy import notification_handler
-    from plexpy import notifiers
-    from plexpy import plex
-    from plexpy import plextv
-    from plexpy import users
-    from plexpy import versioncheck
-    from plexpy import web_socket
-    from plexpy import webstart
-    from plexpy import config
+from plexpy import activity_handler
+from plexpy import activity_pinger
+from plexpy import common
+from plexpy import database
+from plexpy import datafactory
+from plexpy import exporter
+from plexpy import helpers
+from plexpy import libraries
+from plexpy import logger
+from plexpy import mobile_app
+from plexpy import newsletters
+from plexpy import newsletter_handler
+from plexpy import notification_handler
+from plexpy import notifiers
+from plexpy import plex
+from plexpy import plextv
+from plexpy import users
+from plexpy import versioncheck
+from plexpy import web_socket
+from plexpy import webstart
+from plexpy import config
 
 
 PROG_DIR = None
@@ -214,11 +185,10 @@ def initialize(config_file):
         logger.initLogger(console=not QUIET, log_dir=CONFIG.LOG_DIR if log_writable else None,
                           verbose=VERBOSE)
 
-        if not PYTHON2:
-            os.environ['PLEXAPI_CONFIG_PATH'] = os.path.join(DATA_DIR, 'plexapi.config.ini')
-            os.environ['PLEXAPI_LOG_PATH'] = os.path.join(CONFIG.LOG_DIR, 'plexapi.log')
-            os.environ['PLEXAPI_LOG_LEVEL'] = 'DEBUG'
-            plex.initialize_plexapi()
+        os.environ['PLEXAPI_CONFIG_PATH'] = os.path.join(DATA_DIR, 'plexapi.config.ini')
+        os.environ['PLEXAPI_LOG_PATH'] = os.path.join(CONFIG.LOG_DIR, 'plexapi.log')
+        os.environ['PLEXAPI_LOG_LEVEL'] = 'DEBUG'
+        plex.initialize_plexapi()
 
         if DOCKER:
             build = '[Docker] '
diff --git a/plexpy/activity_handler.py b/plexpy/activity_handler.py
index e98b881f..2758133b 100644
--- a/plexpy/activity_handler.py
+++ b/plexpy/activity_handler.py
@@ -13,10 +13,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import str
-from future.builtins import object
-
 import datetime
 import os
 import time
@@ -25,22 +21,13 @@ from apscheduler.triggers.date import DateTrigger
 import pytz
 
 import plexpy
-if plexpy.PYTHON2:
-    import activity_processor
-    import common
-    import datafactory
-    import helpers
-    import logger
-    import notification_handler
-    import pmsconnect
-else:
-    from plexpy import activity_processor
-    from plexpy import common
-    from plexpy import datafactory
-    from plexpy import helpers
-    from plexpy import logger
-    from plexpy import notification_handler
-    from plexpy import pmsconnect
+from plexpy import activity_processor
+from plexpy import common
+from plexpy import datafactory
+from plexpy import helpers
+from plexpy import logger
+from plexpy import notification_handler
+from plexpy import pmsconnect
 
 
 ACTIVITY_SCHED = None
diff --git a/plexpy/activity_pinger.py b/plexpy/activity_pinger.py
index f349268c..9e8487fb 100644
--- a/plexpy/activity_pinger.py
+++ b/plexpy/activity_pinger.py
@@ -13,34 +13,18 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import str
-
 import threading
 
 import plexpy
-if plexpy.PYTHON2:
-    import activity_handler
-    import activity_processor
-    import database
-    import helpers
-    import libraries
-    import logger
-    import notification_handler
-    import plextv
-    import pmsconnect
-    import web_socket
-else:
-    from plexpy import activity_handler
-    from plexpy import activity_processor
-    from plexpy import database
-    from plexpy import helpers
-    from plexpy import libraries
-    from plexpy import logger
-    from plexpy import notification_handler
-    from plexpy import plextv
-    from plexpy import pmsconnect
-    from plexpy import web_socket
+from plexpy import activity_handler
+from plexpy import activity_processor
+from plexpy import database
+from plexpy import helpers
+from plexpy import logger
+from plexpy import notification_handler
+from plexpy import plextv
+from plexpy import pmsconnect
+from plexpy import web_socket
 
 
 monitor_lock = threading.Lock()
diff --git a/plexpy/activity_processor.py b/plexpy/activity_processor.py
index d2b4b163..952d8e59 100644
--- a/plexpy/activity_processor.py
+++ b/plexpy/activity_processor.py
@@ -13,28 +13,16 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import str
-from future.builtins import object
-
 from collections import defaultdict
 import json
 
 import plexpy
-if plexpy.PYTHON2:
-    import database
-    import helpers
-    import libraries
-    import logger
-    import pmsconnect
-    import users
-else:
-    from plexpy import database
-    from plexpy import helpers
-    from plexpy import libraries
-    from plexpy import logger
-    from plexpy import pmsconnect
-    from plexpy import users
+from plexpy import database
+from plexpy import helpers
+from plexpy import libraries
+from plexpy import logger
+from plexpy import pmsconnect
+from plexpy import users
 
 
 class ActivityProcessor(object):
diff --git a/plexpy/api2.py b/plexpy/api2.py
index eefaa9fd..9cc36b49 100644
--- a/plexpy/api2.py
+++ b/plexpy/api2.py
@@ -15,11 +15,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-
-from __future__ import unicode_literals
-from future.builtins import str
-from future.builtins import object
-
 from hashing_passwords import check_hash
 from io import open
 
@@ -36,34 +31,19 @@ import cherrypy
 import xmltodict
 
 import plexpy
-if plexpy.PYTHON2:
-    import common
-    import config
-    import database
-    import helpers
-    import libraries
-    import logger
-    import mobile_app
-    import notification_handler
-    import notifiers
-    import newsletter_handler
-    import newsletters
-    import plextv
-    import users
-else:
-    from plexpy import common
-    from plexpy import config
-    from plexpy import database
-    from plexpy import helpers
-    from plexpy import libraries
-    from plexpy import logger
-    from plexpy import mobile_app
-    from plexpy import notification_handler
-    from plexpy import notifiers
-    from plexpy import newsletter_handler
-    from plexpy import newsletters
-    from plexpy import plextv
-    from plexpy import users
+from plexpy import common
+from plexpy import config
+from plexpy import database
+from plexpy import helpers
+from plexpy import libraries
+from plexpy import logger
+from plexpy import mobile_app
+from plexpy import notification_handler
+from plexpy import notifiers
+from plexpy import newsletter_handler
+from plexpy import newsletters
+from plexpy import plextv
+from plexpy import users
 
 
 class API2(object):
diff --git a/plexpy/classes.py b/plexpy/classes.py
deleted file mode 100644
index 8480b952..00000000
--- a/plexpy/classes.py
+++ /dev/null
@@ -1,75 +0,0 @@
-# -*- coding: utf-8 -*-
-
-#  This file is part of Tautulli.
-#
-#  Tautulli is free software: you can redistribute it and/or modify
-#  it under the terms of the GNU General Public License as published by
-#  the Free Software Foundation, either version 3 of the License, or
-#  (at your option) any later version.
-#
-#  Tautulli is distributed in the hope that it will be useful,
-#  but WITHOUT ANY WARRANTY; without even the implied warranty of
-#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-#  GNU General Public License for more details.
-#
-#  You should have received a copy of the GNU General Public License
-#  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
-
-#########################################
-## Stolen from Sick-Beard's classes.py ##
-#########################################
-
-
-from __future__ import unicode_literals
-
-from future.moves.urllib.request import FancyURLopener
-
-import plexpy
-if plexpy.PYTHON2:
-    from common import USER_AGENT
-else:
-    from plexpy.common import USER_AGENT
-
-
-class PlexPyURLopener(FancyURLopener):
-    version = USER_AGENT
-
-
-class AuthURLOpener(PlexPyURLopener):
-    """
-    URLOpener class that supports http auth without needing interactive password entry.
-    If the provided username/password don't work it simply fails.
-
-    user: username to use for HTTP auth
-    pw: password to use for HTTP auth
-    """
-
-    def __init__(self, user, pw):
-        self.username = user
-        self.password = pw
-
-        # remember if we've tried the username/password before
-        self.numTries = 0
-
-        # call the base class
-        FancyURLopener.__init__(self)
-
-    def prompt_user_passwd(self, host, realm):
-        """
-        Override this function and instead of prompting just give the
-        username/password that were provided when the class was instantiated.
-        """
-
-        # if this is the first try then provide a username/password
-        if self.numTries == 0:
-            self.numTries = 1
-            return (self.username, self.password)
-
-        # if we've tried before then return blank which cancels the request
-        else:
-            return ('', '')
-
-    # this is pretty much just a hack for convenience
-    def openit(self, url):
-        self.numTries = 0
-        return PlexPyURLopener.open(self, url)
diff --git a/plexpy/common.py b/plexpy/common.py
index 10679449..ae6f6c98 100644
--- a/plexpy/common.py
+++ b/plexpy/common.py
@@ -15,17 +15,11 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-
 import distro
 import platform
 from collections import OrderedDict
 
-import plexpy
-if plexpy.PYTHON2:
-    import version
-else:
-    from plexpy import version
+from plexpy import version
 
 
 # Identify Our Application
diff --git a/plexpy/config.py b/plexpy/config.py
index dbcd294d..c41e3b59 100644
--- a/plexpy/config.py
+++ b/plexpy/config.py
@@ -13,10 +13,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import object
-from future.builtins import str
-
 import os
 import re
 import shutil
@@ -27,12 +23,8 @@ from configobj import ConfigObj, ParseError
 from hashing_passwords import make_hash
 
 import plexpy
-if plexpy.PYTHON2:
-    import helpers
-    import logger
-else:
-    from plexpy import helpers
-    from plexpy import logger
+from plexpy import helpers
+from plexpy import logger
 
 
 def bool_int(value):
diff --git a/plexpy/database.py b/plexpy/database.py
index 859d9274..4762805f 100644
--- a/plexpy/database.py
+++ b/plexpy/database.py
@@ -13,10 +13,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import str
-from future.builtins import object
-
 import os
 import sqlite3
 import shutil
@@ -24,12 +20,8 @@ import threading
 import time
 
 import plexpy
-if plexpy.PYTHON2:
-    import helpers
-    import logger
-else:
-    from plexpy import helpers
-    from plexpy import logger
+from plexpy import helpers
+from plexpy import logger
 
 
 FILENAME = "tautulli.db"
diff --git a/plexpy/datafactory.py b/plexpy/datafactory.py
index d525c9c9..d48d3ea8 100644
--- a/plexpy/datafactory.py
+++ b/plexpy/datafactory.py
@@ -15,35 +15,17 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division
-from __future__ import unicode_literals
-from future.builtins import next
-from future.builtins import str
-from future.builtins import object
-
 import json
 
 import plexpy
-if plexpy.PYTHON2:
-    import common
-    import database
-    import datatables
-    import libraries
-    import helpers
-    import logger
-    import pmsconnect
-    import session
-    import users
-else:
-    from plexpy import libraries
-    from plexpy import common
-    from plexpy import database
-    from plexpy import datatables
-    from plexpy import helpers
-    from plexpy import logger
-    from plexpy import pmsconnect
-    from plexpy import session
-    from plexpy import users
+from plexpy import common
+from plexpy import database
+from plexpy import datatables
+from plexpy import helpers
+from plexpy import logger
+from plexpy import pmsconnect
+from plexpy import session
+from plexpy import users
 
 # Temporarily store update_metadata row ids in memory to prevent rating_key collisions
 _UPDATE_METADATA_IDS = {
diff --git a/plexpy/datatables.py b/plexpy/datatables.py
index 47a913d6..68c76c57 100644
--- a/plexpy/datatables.py
+++ b/plexpy/datatables.py
@@ -13,20 +13,12 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import object
-
 import re
 
 import plexpy
-if plexpy.PYTHON2:
-    import database
-    import helpers
-    import logger
-else:
-    from plexpy import database
-    from plexpy import helpers
-    from plexpy import logger
+from plexpy import database
+from plexpy import helpers
+from plexpy import logger
 
 
 class DataTables(object):
diff --git a/plexpy/exceptions.py b/plexpy/exceptions.py
index 96bb1032..cbbb0b2a 100644
--- a/plexpy/exceptions.py
+++ b/plexpy/exceptions.py
@@ -13,8 +13,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-
 
 class PlexPyException(Exception):
     """
diff --git a/plexpy/exporter.py b/plexpy/exporter.py
index efb1abf3..ef6e0da7 100644
--- a/plexpy/exporter.py
+++ b/plexpy/exporter.py
@@ -15,10 +15,7 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import str
-from backports import csv
-
+import csv
 import json
 import os
 import requests
@@ -30,20 +27,12 @@ from io import open
 from multiprocessing.dummy import Pool as ThreadPool
 
 import plexpy
-if plexpy.PYTHON2:
-    import database
-    import datatables
-    import helpers
-    import logger
-    import users
-    from plex import Plex
-else:
-    from plexpy import database
-    from plexpy import datatables
-    from plexpy import helpers
-    from plexpy import logger
-    from plexpy import users
-    from plexpy.plex import Plex
+from plexpy import database
+from plexpy import datatables
+from plexpy import helpers
+from plexpy import logger
+from plexpy import users
+from plexpy.plex import Plex
 
 
 class Export(object):
diff --git a/plexpy/graphs.py b/plexpy/graphs.py
index 8758f71f..70122aee 100644
--- a/plexpy/graphs.py
+++ b/plexpy/graphs.py
@@ -15,28 +15,17 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import str
-from future.builtins import range
-from future.builtins import object
+import datetime
 
 import arrow
-import datetime
+
 import plexpy
-if plexpy.PYTHON2:
-    import common
-    import database
-    import helpers
-    import logger
-    import libraries
-    import session
-else:
-    from plexpy import common
-    from plexpy import database
-    from plexpy import helpers
-    from plexpy import logger
-    from plexpy import libraries
-    from plexpy import session
+from plexpy import common
+from plexpy import database
+from plexpy import helpers
+from plexpy import logger
+from plexpy import libraries
+from plexpy import session
 
 
 class Graphs(object):
diff --git a/plexpy/helpers.py b/plexpy/helpers.py
index b2be62e2..014f1359 100644
--- a/plexpy/helpers.py
+++ b/plexpy/helpers.py
@@ -15,12 +15,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division
-from __future__ import unicode_literals
-
-from future.builtins import zip
-from future.builtins import str
-
 import arrow
 import base64
 import cloudinary
@@ -50,21 +44,15 @@ import string
 import sys
 import time
 import unicodedata
-from future.moves.urllib.parse import urlencode
+from urllib.parse import urlencode
 from xml.dom import minidom
 import xmltodict
 
 import plexpy
-if plexpy.PYTHON2:
-    import common
-    import logger
-    import request
-    from api2 import API2
-else:
-    from plexpy import common
-    from plexpy import logger
-    from plexpy import request
-    from plexpy.api2 import API2
+from plexpy import common
+from plexpy import logger
+from plexpy import request
+from plexpy.api2 import API2
 
 
 def addtoapi(*dargs, **dkwargs):
@@ -870,17 +858,11 @@ def upload_to_cloudinary(img_data, img_title='', rating_key='', fallback=''):
         api_secret=plexpy.CONFIG.CLOUDINARY_API_SECRET
     )
 
-    # Cloudinary library has very poor support for non-ASCII characters on Python 2
-    if plexpy.PYTHON2:
-        _img_title = latinToAscii(img_title, replace=True)
-    else:
-        _img_title = img_title
-
     try:
         response = upload((img_title, img_data),
                           public_id='{}_{}'.format(fallback, rating_key),
                           tags=['tautulli', fallback, str(rating_key)],
-                          context={'title': _img_title, 'rating_key': str(rating_key), 'fallback': fallback})
+                          context={'title': img_title, 'rating_key': str(rating_key), 'fallback': fallback})
         logger.debug("Tautulli Helpers :: Image '{}' ({}) uploaded to Cloudinary.".format(img_title, fallback))
         img_url = response.get('url', '')
     except Exception as e:
@@ -1266,11 +1248,7 @@ def split_args(args=None):
     if isinstance(args, list):
         return args
     elif isinstance(args, str):
-        if plexpy.PYTHON2:
-            args = args.encode('utf-8')
         args = shlex.split(args)
-        if plexpy.PYTHON2:
-            args = [a.decode('utf-8') for a in args]
         return args
     return []
 
diff --git a/plexpy/http_handler.py b/plexpy/http_handler.py
index 3596fa12..3ba32a6e 100644
--- a/plexpy/http_handler.py
+++ b/plexpy/http_handler.py
@@ -15,24 +15,16 @@
 #  You should have received a copy of the GNU General Public License
 #  along with PlexPy.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import object
-from future.builtins import str
-
 from multiprocessing.dummy import Pool as ThreadPool
-from future.moves.urllib.parse import urljoin
+from urllib.parse import urljoin
 
 import certifi
 import requests
 import urllib3
 
 import plexpy
-if plexpy.PYTHON2:
-    import helpers
-    import logger
-else:
-    from plexpy import helpers
-    from plexpy import logger
+from plexpy import helpers
+from plexpy import logger
 
 
 class HTTPHandler(object):
diff --git a/plexpy/libraries.py b/plexpy/libraries.py
index 33832aba..454f6128 100644
--- a/plexpy/libraries.py
+++ b/plexpy/libraries.py
@@ -15,38 +15,20 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import str
-from future.builtins import next
-from future.builtins import object
-
 import json
 import os
-from datetime import datetime, timedelta
 
 import plexpy
-if plexpy.PYTHON2:
-    import common
-    import database
-    import datatables
-    import helpers
-    import logger
-    import plextv
-    import pmsconnect
-    import session
-    import users
-    from plex import Plex
-else:
-    from plexpy import common
-    from plexpy import database
-    from plexpy import datatables
-    from plexpy import helpers
-    from plexpy import logger
-    from plexpy import plextv
-    from plexpy import pmsconnect
-    from plexpy import session
-    from plexpy import users
-    from plexpy.plex import Plex
+from plexpy import common
+from plexpy import database
+from plexpy import datatables
+from plexpy import helpers
+from plexpy import logger
+from plexpy import plextv
+from plexpy import pmsconnect
+from plexpy import session
+from plexpy import users
+from plexpy.plex import Plex
 
 
 def refresh_libraries():
diff --git a/plexpy/lock.py b/plexpy/lock.py
index 6cdc6800..570803bc 100644
--- a/plexpy/lock.py
+++ b/plexpy/lock.py
@@ -15,18 +15,12 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import object
-
-import future.moves.queue as queue
+import queue
 import time
 import threading
 
 import plexpy
-if plexpy.PYTHON2:
-    import logger
-else:
-    from plexpy import logger
+from plexpy import logger
 
 
 class TimedLock(object):
diff --git a/plexpy/log_reader.py b/plexpy/log_reader.py
index 358ca86c..63a55d71 100644
--- a/plexpy/log_reader.py
+++ b/plexpy/log_reader.py
@@ -15,18 +15,13 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
 from io import open
 
 import os
 
 import plexpy
-if plexpy.PYTHON2:
-    import helpers
-    import logger
-else:
-    from plexpy import helpers
-    from plexpy import logger
+from plexpy import helpers
+from plexpy import logger
 
 
 def list_plex_logs():
diff --git a/plexpy/logger.py b/plexpy/logger.py
index 7227ab10..b4f0f3f3 100644
--- a/plexpy/logger.py
+++ b/plexpy/logger.py
@@ -15,9 +15,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import str
-
 from logging import handlers
 
 import cherrypy
@@ -29,13 +26,8 @@ import threading
 import traceback
 
 import plexpy
-if plexpy.PYTHON2:
-    import helpers
-    import users
-    from config import _BLACKLIST_KEYS, _WHITELIST_KEYS
-else:
-    from plexpy import helpers, users
-    from plexpy.config import _BLACKLIST_KEYS, _WHITELIST_KEYS
+from plexpy import helpers, users
+from plexpy.config import _BLACKLIST_KEYS, _WHITELIST_KEYS
 
 
 # These settings are for file logging only
diff --git a/plexpy/macos.py b/plexpy/macos.py
index 4dafaa13..d2589fad 100644
--- a/plexpy/macos.py
+++ b/plexpy/macos.py
@@ -31,14 +31,9 @@ if HAS_PYOBJC:
     import rumps
 
 import plexpy
-if plexpy.PYTHON2:
-    import common
-    import logger
-    import versioncheck
-else:
-    from plexpy import common
-    from plexpy import logger
-    from plexpy import versioncheck
+from plexpy import common
+from plexpy import logger
+from plexpy import versioncheck
 
 
 class MacOSSystemTray(object):
diff --git a/plexpy/mobile_app.py b/plexpy/mobile_app.py
index 57734975..4d1267a1 100644
--- a/plexpy/mobile_app.py
+++ b/plexpy/mobile_app.py
@@ -15,21 +15,12 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import str
-
 import requests
 import threading
 
-import plexpy
-if plexpy.PYTHON2:
-    import database
-    import helpers
-    import logger
-else:
-    from plexpy import database
-    from plexpy import helpers
-    from plexpy import logger
+from plexpy import database
+from plexpy import helpers
+from plexpy import logger
 
 
 _ONESIGNAL_APP_ID = '3b4b666a-d557-4b92-acdf-e2c8c4b95357'
diff --git a/plexpy/newsletter_handler.py b/plexpy/newsletter_handler.py
index 471a5984..69d646d9 100644
--- a/plexpy/newsletter_handler.py
+++ b/plexpy/newsletter_handler.py
@@ -15,8 +15,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-
 from io import open
 import os
 
@@ -24,16 +22,10 @@ from apscheduler.triggers.cron import CronTrigger
 import email.utils
 
 import plexpy
-if plexpy.PYTHON2:
-    import database
-    import helpers
-    import logger
-    import newsletters
-else:
-    from plexpy import database
-    from plexpy import helpers
-    from plexpy import logger
-    from plexpy import newsletters
+from plexpy import database
+from plexpy import helpers
+from plexpy import logger
+from plexpy import newsletters
 
 
 NEWSLETTER_SCHED = None
diff --git a/plexpy/newsletters.py b/plexpy/newsletters.py
index 5fe8448c..7641decf 100644
--- a/plexpy/newsletters.py
+++ b/plexpy/newsletters.py
@@ -15,39 +15,25 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import next
-from future.builtins import str
-from future.builtins import object
-
-import arrow
 from collections import OrderedDict
 import json
 from itertools import groupby
-from mako.lookup import TemplateLookup
-from mako import exceptions
 import os
 import re
 
+import arrow
+from mako.lookup import TemplateLookup
+from mako import exceptions
+
 import plexpy
-if plexpy.PYTHON2:
-    import common
-    import database
-    import helpers
-    import libraries
-    import logger
-    import newsletter_handler
-    import pmsconnect
-    from notifiers import send_notification, EMAIL
-else:
-    from plexpy import common
-    from plexpy import database
-    from plexpy import helpers
-    from plexpy import libraries
-    from plexpy import logger
-    from plexpy import newsletter_handler
-    from plexpy import pmsconnect
-    from plexpy.notifiers import send_notification, EMAIL
+from plexpy import common
+from plexpy import database
+from plexpy import helpers
+from plexpy import libraries
+from plexpy import logger
+from plexpy import newsletter_handler
+from plexpy import pmsconnect
+from plexpy.notifiers import send_notification, EMAIL
 
 
 AGENT_IDS = {
diff --git a/plexpy/notification_handler.py b/plexpy/notification_handler.py
index c58bae9a..e981b17b 100644
--- a/plexpy/notification_handler.py
+++ b/plexpy/notification_handler.py
@@ -15,16 +15,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-
-from __future__ import division
-from __future__ import unicode_literals
-from typing import Optional
-from future.builtins import next
-from future.builtins import map
-from future.builtins import str
-from future.builtins import range
-
-import arrow
 import bleach
 from collections import Counter, defaultdict
 from functools import partial
@@ -36,32 +26,22 @@ import os
 import re
 from string import Formatter
 import threading
+from typing import Optional
 
+import arrow
 import musicbrainzngs
 
 import plexpy
-if plexpy.PYTHON2:
-    import activity_processor
-    import common
-    import database
-    import datafactory
-    import logger
-    import helpers
-    import notifiers
-    import pmsconnect
-    import request
-    from newsletter_handler import notify as notify_newsletter
-else:
-    from plexpy import activity_processor
-    from plexpy import common
-    from plexpy import database
-    from plexpy import datafactory
-    from plexpy import logger
-    from plexpy import helpers
-    from plexpy import notifiers
-    from plexpy import pmsconnect
-    from plexpy import request
-    from plexpy.newsletter_handler import notify as notify_newsletter
+from plexpy import activity_processor
+from plexpy import common
+from plexpy import database
+from plexpy import datafactory
+from plexpy import logger
+from plexpy import helpers
+from plexpy import notifiers
+from plexpy import pmsconnect
+from plexpy import request
+from plexpy.newsletter_handler import notify as notify_newsletter
 
 
 def process_queue():
@@ -2090,14 +2070,10 @@ class CustomFormatter(Formatter):
                 obj = self.convert_field(obj, conversion)
 
                 # expand the format spec, if needed
-                if plexpy.PYTHON2:
-                    format_spec = self._vformat(format_spec, args, kwargs,
-                                                used_args, recursion_depth - 1)
-                else:
-                    format_spec, auto_arg_index = self._vformat(
-                        format_spec, args, kwargs,
-                        used_args, recursion_depth-1,
-                        auto_arg_index=auto_arg_index)
+                format_spec, auto_arg_index = self._vformat(
+                    format_spec, args, kwargs,
+                    used_args, recursion_depth-1,
+                    auto_arg_index=auto_arg_index)
 
                 # format the object and append to the result
                 formatted_field = self.format_field(obj, format_spec)
@@ -2109,10 +2085,7 @@ class CustomFormatter(Formatter):
                         result.append(suffix)
                 # result.append(self.format_field(obj, format_spec))
 
-        if plexpy.PYTHON2:
-            return ''.join(result)
-        else:
-            return ''.join(result), auto_arg_index
+        return ''.join(result), auto_arg_index
 
 
 class CustomArrow:
diff --git a/plexpy/notifiers.py b/plexpy/notifiers.py
index 4d7c9735..5305ffa2 100644
--- a/plexpy/notifiers.py
+++ b/plexpy/notifiers.py
@@ -15,30 +15,27 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import str
-from future.builtins import object
-
 import base64
-import bleach
 from collections import defaultdict
-import json
 from email.mime.multipart import MIMEMultipart
 from email.mime.text import MIMEText
 import email.utils
-import paho.mqtt.client
-import paho.mqtt.publish
+import json
 import os
 import re
-import requests
-from requests.auth import HTTPBasicAuth
 import smtplib
 import subprocess
 import sys
 import threading
 import time
-from future.moves.urllib.parse import urlencode
-from future.moves.urllib.parse import urlparse
+from urllib.parse import urlencode
+from urllib.parse import urlparse
+
+import bleach
+import paho.mqtt.client
+import paho.mqtt.publish
+import requests
+from requests.auth import HTTPBasicAuth
 
 try:
     from Cryptodome.Protocol.KDF import PBKDF2
@@ -61,24 +58,14 @@ import facebook
 import twitter
 
 import plexpy
-if plexpy.PYTHON2:
-    import common
-    import database
-    import helpers
-    import logger
-    import mobile_app
-    import pmsconnect
-    import request
-    import users
-else:
-    from plexpy import common
-    from plexpy import database
-    from plexpy import helpers
-    from plexpy import logger
-    from plexpy import mobile_app
-    from plexpy import pmsconnect
-    from plexpy import request
-    from plexpy import users
+from plexpy import common
+from plexpy import database
+from plexpy import helpers
+from plexpy import logger
+from plexpy import mobile_app
+from plexpy import pmsconnect
+from plexpy import request
+from plexpy import users
 
 
 BROWSER_NOTIFIERS = {}
@@ -3451,9 +3438,6 @@ class SCRIPTS(Notifier):
         if self.pythonpath and plexpy.INSTALL_TYPE not in ('windows', 'macos'):
             custom_env['PYTHONPATH'] = os.pathsep.join([p for p in sys.path if p])
 
-        if plexpy.PYTHON2:
-            custom_env = {k.encode('utf-8'): v.encode('utf-8') for k, v in custom_env.items()}
-
         env = os.environ.copy()
         env.update(custom_env)
 
@@ -3558,9 +3542,6 @@ class SCRIPTS(Notifier):
 
         script.extend(script_args)
 
-        if plexpy.PYTHON2:
-            script = [s.encode(plexpy.SYS_ENCODING, 'ignore') for s in script]
-
         logger.debug("Tautulli Notifiers :: Full script is: %s" % script)
         logger.debug("Tautulli Notifiers :: Executing script in a new thread.")
         thread = threading.Thread(target=self.run_script, args=(script, user_id)).start()
diff --git a/plexpy/plex.py b/plexpy/plex.py
index 29379053..05a1bbb8 100644
--- a/plexpy/plex.py
+++ b/plexpy/plex.py
@@ -15,16 +15,7 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import object
-from future.builtins import str
-
 import plexpy
-if plexpy.PYTHON2:
-    import logger
-else:
-    from plexpy import logger
-
 
 class DummyObject(object):
     def __init__(self, *args, **kwargs):
diff --git a/plexpy/plexivity_import.py b/plexpy/plexivity_import.py
index 644782a2..291abf19 100644
--- a/plexpy/plexivity_import.py
+++ b/plexpy/plexivity_import.py
@@ -15,26 +15,16 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import str
-
-import arrow
 import sqlite3
 from xml.dom import minidom
 
-import plexpy
-if plexpy.PYTHON2:
-    import activity_processor
-    import database
-    import helpers
-    import logger
-    import users
-else:
-    from plexpy import activity_processor
-    from plexpy import database
-    from plexpy import helpers
-    from plexpy import logger
-    from plexpy import users
+import arrow
+
+from plexpy import activity_processor
+from plexpy import database
+from plexpy import helpers
+from plexpy import logger
+from plexpy import users
 
 
 def extract_plexivity_xml(xml=None):
diff --git a/plexpy/plextv.py b/plexpy/plextv.py
index d3afb26a..d45ce785 100644
--- a/plexpy/plextv.py
+++ b/plexpy/plextv.py
@@ -15,33 +15,18 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import next
-from future.builtins import str
-from future.builtins import object
-from future.moves.urllib.parse import unquote
-
 import json
+from urllib.parse import unquote
 
 import plexpy
-if plexpy.PYTHON2:
-    import common
-    import helpers
-    import http_handler
-    import logger
-    import users
-    import pmsconnect
-    import session
-    from plex import Plex
-else:
-    from plexpy import common
-    from plexpy import helpers
-    from plexpy import http_handler
-    from plexpy import logger
-    from plexpy import users
-    from plexpy import pmsconnect
-    from plexpy import session
-    from plexpy.plex import Plex
+from plexpy import common
+from plexpy import helpers
+from plexpy import http_handler
+from plexpy import logger
+from plexpy import users
+from plexpy import pmsconnect
+from plexpy import session
+from plexpy.plex import Plex
 
 
 def get_server_resources(return_presence=False, return_server=False, return_info=False, **kwargs):
diff --git a/plexpy/plexwatch_import.py b/plexpy/plexwatch_import.py
index 4d8ec80b..ac4ffdbe 100644
--- a/plexpy/plexwatch_import.py
+++ b/plexpy/plexwatch_import.py
@@ -15,25 +15,14 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import str
-
 import sqlite3
 from xml.dom import minidom
 
-import plexpy
-if plexpy.PYTHON2:
-    import activity_processor
-    import database
-    import helpers
-    import logger
-    import users
-else:
-    from plexpy import activity_processor
-    from plexpy import database
-    from plexpy import helpers
-    from plexpy import logger
-    from plexpy import users
+from plexpy import activity_processor
+from plexpy import database
+from plexpy import helpers
+from plexpy import logger
+from plexpy import users
 
 
 def extract_plexwatch_xml(xml=None):
diff --git a/plexpy/pmsconnect.py b/plexpy/pmsconnect.py
index 2662abf9..fa36219f 100644
--- a/plexpy/pmsconnect.py
+++ b/plexpy/pmsconnect.py
@@ -15,38 +15,22 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import next
-from future.builtins import str
-from future.builtins import object
-
 import json
 import os
 import time
-from future.moves.urllib.parse import quote, quote_plus, urlencode
+from urllib.parse import quote, quote_plus, urlencode
 from xml.dom.minidom import Node
 
 import plexpy
-if plexpy.PYTHON2:
-    import activity_processor
-    import common
-    import helpers
-    import http_handler
-    import libraries
-    import logger
-    import plextv
-    import session
-    import users
-else:
-    from plexpy import activity_processor
-    from plexpy import common
-    from plexpy import helpers
-    from plexpy import http_handler
-    from plexpy import libraries
-    from plexpy import logger
-    from plexpy import plextv
-    from plexpy import session
-    from plexpy import users
+from plexpy import activity_processor
+from plexpy import common
+from plexpy import helpers
+from plexpy import http_handler
+from plexpy import libraries
+from plexpy import logger
+from plexpy import plextv
+from plexpy import session
+from plexpy import users
 
 
 def get_server_friendly_name():
diff --git a/plexpy/request.py b/plexpy/request.py
index 50bb8a0a..c2f0967f 100644
--- a/plexpy/request.py
+++ b/plexpy/request.py
@@ -15,23 +15,16 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import str
-
-from bs4 import BeautifulSoup
+import collections
 from xml.dom import minidom
 
-import collections
+from bs4 import BeautifulSoup
 import requests
 from requests.packages import urllib3
 
 import plexpy
-if plexpy.PYTHON2:
-    import lock
-    import logger
-else:
-    from plexpy import lock
-    from plexpy import logger
+from plexpy import lock
+from plexpy import logger
 
 
 # Dictionary with last request times, for rate limiting.
diff --git a/plexpy/session.py b/plexpy/session.py
index 21c14430..368e5da7 100644
--- a/plexpy/session.py
+++ b/plexpy/session.py
@@ -15,18 +15,11 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import str
-
 import cherrypy
 
 import plexpy
-if plexpy.PYTHON2:
-    import common
-    import users
-else:
-    from plexpy import common
-    from plexpy import users
+from plexpy import common
+from plexpy import users
 
 
 def get_session_info():
diff --git a/plexpy/users.py b/plexpy/users.py
index 67293800..447f20a1 100644
--- a/plexpy/users.py
+++ b/plexpy/users.py
@@ -15,35 +15,20 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import next
-from future.builtins import str
-from future.builtins import object
-from future.moves.urllib.parse import parse_qsl
+from urllib.parse import parse_qsl
 
 import arrow
 import httpagentparser
-from datetime import datetime, timedelta
 
 import plexpy
-if plexpy.PYTHON2:
-    import common
-    import database
-    import datatables
-    import helpers
-    import libraries
-    import logger
-    import plextv
-    import session
-else:
-    from plexpy import common
-    from plexpy import database
-    from plexpy import datatables
-    from plexpy import helpers
-    from plexpy import libraries
-    from plexpy import logger
-    from plexpy import plextv
-    from plexpy import session
+from plexpy import common
+from plexpy import database
+from plexpy import datatables
+from plexpy import helpers
+from plexpy import libraries
+from plexpy import logger
+from plexpy import plextv
+from plexpy import session
 
 
 def refresh_users():
diff --git a/plexpy/version.py b/plexpy/version.py
index e0d43b73..46b4390e 100644
--- a/plexpy/version.py
+++ b/plexpy/version.py
@@ -15,7 +15,5 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-
 PLEXPY_BRANCH = "beta"
 PLEXPY_RELEASE_VERSION = "v2.14.0-beta"
\ No newline at end of file
diff --git a/plexpy/versioncheck.py b/plexpy/versioncheck.py
index 2f07d7ae..442dcc23 100644
--- a/plexpy/versioncheck.py
+++ b/plexpy/versioncheck.py
@@ -15,11 +15,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division
-from __future__ import unicode_literals
-from future.builtins import next
-from future.builtins import str
-
 import json
 import os
 import platform
@@ -29,16 +24,10 @@ import subprocess
 import tarfile
 
 import plexpy
-if plexpy.PYTHON2:
-    import common
-    import helpers
-    import logger
-    import request
-else:
-    from plexpy import common
-    from plexpy import helpers
-    from plexpy import logger
-    from plexpy import request
+from plexpy import common
+from plexpy import helpers
+from plexpy import logger
+from plexpy import request
 
 
 def runGit(args):
@@ -292,9 +281,6 @@ def check_github(scheduler=False, notify=False, use_cache=False):
                                      'plexpy_update_commit': plexpy.LATEST_VERSION,
                                      'plexpy_update_behind': plexpy.COMMITS_BEHIND})
 
-        if plexpy.PYTHON2:
-            logger.warn('Tautulli is running using Python 2. Unable to run automatic update.')
-
         elif scheduler and plexpy.CONFIG.PLEXPY_AUTO_UPDATE and \
                 not plexpy.DOCKER and not plexpy.SNAP and not plexpy.FROZEN:
             logger.info('Running automatic update.')
@@ -307,10 +293,6 @@ def check_github(scheduler=False, notify=False, use_cache=False):
 
 
 def update():
-    if plexpy.PYTHON2:
-        logger.warn('Tautulli is running using Python 2. Unable to update.')
-        return
-
     if not plexpy.UPDATE_AVAILABLE:
         return
 
diff --git a/plexpy/web_socket.py b/plexpy/web_socket.py
index b70d4b6e..1737c02d 100644
--- a/plexpy/web_socket.py
+++ b/plexpy/web_socket.py
@@ -17,9 +17,6 @@
 
 # Mostly borrowed from https://github.com/trakt/Plex-Trakt-Scrobbler
 
-from __future__ import unicode_literals
-from future.builtins import str
-
 import json
 import ssl
 import threading
@@ -29,18 +26,11 @@ import certifi
 import websocket
 
 import plexpy
-if plexpy.PYTHON2:
-    import activity_handler
-    import activity_pinger
-    import activity_processor
-    import database
-    import logger
-else:
-    from plexpy import activity_handler
-    from plexpy import activity_pinger
-    from plexpy import activity_processor
-    from plexpy import database
-    from plexpy import logger
+from plexpy import activity_handler
+from plexpy import activity_pinger
+from plexpy import activity_processor
+from plexpy import database
+from plexpy import logger
 
 
 name = 'websocket'
diff --git a/plexpy/webauth.py b/plexpy/webauth.py
index 768b2d64..05c81a81 100644
--- a/plexpy/webauth.py
+++ b/plexpy/webauth.py
@@ -20,28 +20,19 @@
 # Form based authentication for CherryPy. Requires the
 # Session tool to be loaded.
 
-from future.builtins import object
-
 from datetime import datetime, timedelta, timezone
-from future.moves.urllib.parse import quote, unquote
+from urllib.parse import quote, unquote
 
 import cherrypy
 from hashing_passwords import check_hash
 import jwt
 
 import plexpy
-if plexpy.PYTHON2:
-    import logger
-    from database import MonitorDatabase
-    from helpers import timestamp
-    from users import Users, refresh_users
-    from plextv import PlexTV
-else:
-    from plexpy import logger
-    from plexpy.database import MonitorDatabase
-    from plexpy.helpers import timestamp
-    from plexpy.users import Users, refresh_users
-    from plexpy.plextv import PlexTV
+from plexpy import logger
+from plexpy.database import MonitorDatabase
+from plexpy.helpers import timestamp
+from plexpy.users import Users, refresh_users
+from plexpy.plextv import PlexTV
 
 # Monkey patch SameSite support into cookies.
 # https://stackoverflow.com/a/50813092
diff --git a/plexpy/webserve.py b/plexpy/webserve.py
index 7e0c083b..444d5a68 100644
--- a/plexpy/webserve.py
+++ b/plexpy/webserve.py
@@ -15,23 +15,18 @@
 #  You should have received a copy of the GNU General Public License
 #  along with Tautulli.  If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import unicode_literals
-from future.builtins import next
-from future.builtins import object
-from future.builtins import str
-from backports import csv
-
-from io import open, BytesIO
 import base64
+import csv
+from io import open, BytesIO
 import json
-import ssl as _ssl
 import linecache
 import os
 import shutil
+import ssl as _ssl
 import sys
 import threading
 import zipfile
-from future.moves.urllib.parse import urlencode
+from urllib.parse import urlencode
 
 import cherrypy
 from cherrypy.lib.static import serve_file, serve_fileobj, serve_download
@@ -49,76 +44,40 @@ if sys.version_info >= (3, 6):
     import secrets
 
 import plexpy
-if plexpy.PYTHON2:
-    import activity_pinger
-    import activity_processor
-    import common
-    import config
-    import database
-    import datafactory
-    import exporter
-    import graphs
-    import helpers
-    import http_handler
-    import libraries
-    import log_reader
-    import logger
-    import newsletter_handler
-    import newsletters
-    import mobile_app
-    import notification_handler
-    import notifiers
-    import plextv
-    import plexivity_import
-    import plexwatch_import
-    import pmsconnect
-    import users
-    import versioncheck
-    import web_socket
-    import webstart
-    from api2 import API2
-    from helpers import checked, addtoapi, get_ip, create_https_certificates, build_datatables_json, sanitize_out
-    from session import get_session_info, get_session_user_id, allow_session_user, allow_session_library
-    from webauth import AuthController, requireAuth, member_of, check_auth, get_jwt_token
-    if common.PLATFORM == 'Windows':
-        import windows
-    elif common.PLATFORM == 'Darwin':
-        import macos
-else:
-    from plexpy import activity_pinger
-    from plexpy import activity_processor
-    from plexpy import common
-    from plexpy import config
-    from plexpy import database
-    from plexpy import datafactory
-    from plexpy import exporter
-    from plexpy import graphs
-    from plexpy import helpers
-    from plexpy import http_handler
-    from plexpy import libraries
-    from plexpy import log_reader
-    from plexpy import logger
-    from plexpy import newsletter_handler
-    from plexpy import newsletters
-    from plexpy import mobile_app
-    from plexpy import notification_handler
-    from plexpy import notifiers
-    from plexpy import plextv
-    from plexpy import plexivity_import
-    from plexpy import plexwatch_import
-    from plexpy import pmsconnect
-    from plexpy import users
-    from plexpy import versioncheck
-    from plexpy import web_socket
-    from plexpy import webstart
-    from plexpy.api2 import API2
-    from plexpy.helpers import checked, addtoapi, get_ip, create_https_certificates, build_datatables_json, sanitize_out
-    from plexpy.session import get_session_info, get_session_user_id, allow_session_user, allow_session_library
-    from plexpy.webauth import AuthController, requireAuth, member_of, check_auth, get_jwt_token
-    if common.PLATFORM == 'Windows':
-        from plexpy import windows
-    elif common.PLATFORM == 'Darwin':
-        from plexpy import macos
+from plexpy import activity_pinger
+from plexpy import activity_processor
+from plexpy import common
+from plexpy import config
+from plexpy import database
+from plexpy import datafactory
+from plexpy import exporter
+from plexpy import graphs
+from plexpy import helpers
+from plexpy import http_handler
+from plexpy import libraries
+from plexpy import log_reader
+from plexpy import logger
+from plexpy import newsletter_handler
+from plexpy import newsletters
+from plexpy import mobile_app
+from plexpy import notification_handler
+from plexpy import notifiers
+from plexpy import plextv
+from plexpy import plexivity_import
+from plexpy import plexwatch_import
+from plexpy import pmsconnect
+from plexpy import users
+from plexpy import versioncheck
+from plexpy import web_socket
+from plexpy import webstart
+from plexpy.api2 import API2
+from plexpy.helpers import checked, addtoapi, get_ip, create_https_certificates, build_datatables_json, sanitize_out
+from plexpy.session import get_session_info, get_session_user_id, allow_session_user, allow_session_library
+from plexpy.webauth import AuthController, requireAuth, member_of, check_auth, get_jwt_token
+if common.PLATFORM == 'Windows':
+    from plexpy import windows
+elif common.PLATFORM == 'Darwin':
+    from plexpy import macos
 
 
 TEMPLATE_LOOKUP = None
@@ -4367,8 +4326,6 @@ class WebInterface(object):
     @cherrypy.expose
     @requireAuth(member_of("admin"))
     def update(self, **kwargs):
-        if plexpy.PYTHON2:
-            raise cherrypy.HTTPRedirect(plexpy.HTTP_ROOT + "home?update=python2")
         if plexpy.DOCKER or plexpy.SNAP:
             raise cherrypy.HTTPRedirect(plexpy.HTTP_ROOT + "home")
 
diff --git a/plexpy/webstart.py b/plexpy/webstart.py
index c8ed258f..b02e9ec1 100644
--- a/plexpy/webstart.py
+++ b/plexpy/webstart.py
@@ -22,16 +22,10 @@ import sys
 import cherrypy
 
 import plexpy
-if plexpy.PYTHON2:
-    import logger
-    import webauth
-    from helpers import create_https_certificates
-    from webserve import WebInterface, BaseRedirect
-else:
-    from plexpy import logger
-    from plexpy import webauth
-    from plexpy.helpers import create_https_certificates
-    from plexpy.webserve import WebInterface, BaseRedirect
+from plexpy import logger
+from plexpy import webauth
+from plexpy.helpers import create_https_certificates
+from plexpy.webserve import WebInterface, BaseRedirect
 
 
 def start():
diff --git a/plexpy/windows.py b/plexpy/windows.py
index 3f94b9f0..857e8a0e 100644
--- a/plexpy/windows.py
+++ b/plexpy/windows.py
@@ -17,6 +17,7 @@
 
 import os
 import sys
+
 from infi.systray import SysTrayIcon
 
 try:
@@ -30,14 +31,9 @@ except ImportError:
     import _winreg as winreg
 
 import plexpy
-if plexpy.PYTHON2:
-    import common
-    import logger
-    import versioncheck
-else:
-    from plexpy import common
-    from plexpy import logger
-    from plexpy import versioncheck
+from plexpy import common
+from plexpy import logger
+from plexpy import versioncheck
 
 
 class WindowsSystemTray(object):
diff --git a/requirements.txt b/requirements.txt
index dceda760..2d8c8448 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,18 +1,16 @@
 apscheduler==3.10.1
 arrow==1.3.0
-backports.csv==1.0.7
-backports.functools-lru-cache==2.0.0
 backports.zoneinfo==0.2.1;python_version<"3.9"
 beautifulsoup4==4.12.3
 bleach==6.1.0
 certifi==2024.2.2
 cheroot==10.0.0
-cloudinary==1.39.1
 cherrypy==18.9.0
+cloudinary==1.39.1
 distro==1.9.0
 dnspython==2.6.1
 facebook-sdk==3.1.0
-future==0.18.3
+future==1.0.0
 ga4mp==2.0.4
 gntp==1.0.3
 html5lib==1.1