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Remove unused Python 2 libraries

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JonnyWong16 2021-10-15 00:34:58 -07:00
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2392
lib/argparse.py
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21
lib/concurrent/LICENSE
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Copyright 2009 Brian Quinlan. All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY BRIAN QUINLAN "AS IS" AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
HALL THE FREEBSD PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

3
lib/concurrent/__init__.py
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from pkgutil import extend_path
__path__ = extend_path(__path__, __name__)

23
lib/concurrent/futures/__init__.py
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# Copyright 2009 Brian Quinlan. All Rights Reserved.
# Licensed to PSF under a Contributor Agreement.
"""Execute computations asynchronously using threads or processes."""
__author__ = 'Brian Quinlan (brian@sweetapp.com)'
from concurrent.futures._base import (FIRST_COMPLETED,
FIRST_EXCEPTION,
ALL_COMPLETED,
CancelledError,
TimeoutError,
Future,
Executor,
wait,
as_completed)
from concurrent.futures.thread import ThreadPoolExecutor
# Jython doesn't have multiprocessing
try:
from concurrent.futures.process import ProcessPoolExecutor
except ImportError:
pass

605
lib/concurrent/futures/_base.py
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# Copyright 2009 Brian Quinlan. All Rights Reserved.
# Licensed to PSF under a Contributor Agreement.
from __future__ import with_statement
import logging
import threading
import time
from concurrent.futures._compat import reraise
try:
from collections import namedtuple
except ImportError:
from concurrent.futures._compat import namedtuple
__author__ = 'Brian Quinlan (brian@sweetapp.com)'
FIRST_COMPLETED = 'FIRST_COMPLETED'
FIRST_EXCEPTION = 'FIRST_EXCEPTION'
ALL_COMPLETED = 'ALL_COMPLETED'
_AS_COMPLETED = '_AS_COMPLETED'
# Possible future states (for internal use by the futures package).
PENDING = 'PENDING'
RUNNING = 'RUNNING'
# The future was cancelled by the user...
CANCELLED = 'CANCELLED'
# ...and _Waiter.add_cancelled() was called by a worker.
CANCELLED_AND_NOTIFIED = 'CANCELLED_AND_NOTIFIED'
FINISHED = 'FINISHED'
_FUTURE_STATES = [
PENDING,
RUNNING,
CANCELLED,
CANCELLED_AND_NOTIFIED,
FINISHED
]
_STATE_TO_DESCRIPTION_MAP = {
PENDING: "pending",
RUNNING: "running",
CANCELLED: "cancelled",
CANCELLED_AND_NOTIFIED: "cancelled",
FINISHED: "finished"
}
# Logger for internal use by the futures package.
LOGGER = logging.getLogger("concurrent.futures")
class Error(Exception):
"""Base class for all future-related exceptions."""
pass
class CancelledError(Error):
"""The Future was cancelled."""
pass
class TimeoutError(Error):
"""The operation exceeded the given deadline."""
pass
class _Waiter(object):
"""Provides the event that wait() and as_completed() block on."""
def __init__(self):
self.event = threading.Event()
self.finished_futures = []
def add_result(self, future):
self.finished_futures.append(future)
def add_exception(self, future):
self.finished_futures.append(future)
def add_cancelled(self, future):
self.finished_futures.append(future)
class _AsCompletedWaiter(_Waiter):
"""Used by as_completed()."""
def __init__(self):
super(_AsCompletedWaiter, self).__init__()
self.lock = threading.Lock()
def add_result(self, future):
with self.lock:
super(_AsCompletedWaiter, self).add_result(future)
self.event.set()
def add_exception(self, future):
with self.lock:
super(_AsCompletedWaiter, self).add_exception(future)
self.event.set()
def add_cancelled(self, future):
with self.lock:
super(_AsCompletedWaiter, self).add_cancelled(future)
self.event.set()
class _FirstCompletedWaiter(_Waiter):
"""Used by wait(return_when=FIRST_COMPLETED)."""
def add_result(self, future):
super(_FirstCompletedWaiter, self).add_result(future)
self.event.set()
def add_exception(self, future):
super(_FirstCompletedWaiter, self).add_exception(future)
self.event.set()
def add_cancelled(self, future):
super(_FirstCompletedWaiter, self).add_cancelled(future)
self.event.set()
class _AllCompletedWaiter(_Waiter):
"""Used by wait(return_when=FIRST_EXCEPTION and ALL_COMPLETED)."""
def __init__(self, num_pending_calls, stop_on_exception):
self.num_pending_calls = num_pending_calls
self.stop_on_exception = stop_on_exception
self.lock = threading.Lock()
super(_AllCompletedWaiter, self).__init__()
def _decrement_pending_calls(self):
with self.lock:
self.num_pending_calls -= 1
if not self.num_pending_calls:
self.event.set()
def add_result(self, future):
super(_AllCompletedWaiter, self).add_result(future)
self._decrement_pending_calls()
def add_exception(self, future):
super(_AllCompletedWaiter, self).add_exception(future)
if self.stop_on_exception:
self.event.set()
else:
self._decrement_pending_calls()
def add_cancelled(self, future):
super(_AllCompletedWaiter, self).add_cancelled(future)
self._decrement_pending_calls()
class _AcquireFutures(object):
"""A context manager that does an ordered acquire of Future conditions."""
def __init__(self, futures):
self.futures = sorted(futures, key=id)
def __enter__(self):
for future in self.futures:
future._condition.acquire()
def __exit__(self, *args):
for future in self.futures:
future._condition.release()
def _create_and_install_waiters(fs, return_when):
if return_when == _AS_COMPLETED:
waiter = _AsCompletedWaiter()
elif return_when == FIRST_COMPLETED:
waiter = _FirstCompletedWaiter()
else:
pending_count = sum(
f._state not in [CANCELLED_AND_NOTIFIED, FINISHED] for f in fs)
if return_when == FIRST_EXCEPTION:
waiter = _AllCompletedWaiter(pending_count, stop_on_exception=True)
elif return_when == ALL_COMPLETED:
waiter = _AllCompletedWaiter(pending_count, stop_on_exception=False)
else:
raise ValueError("Invalid return condition: %r" % return_when)
for f in fs:
f._waiters.append(waiter)
return waiter
def as_completed(fs, timeout=None):
"""An iterator over the given futures that yields each as it completes.
Args:
fs: The sequence of Futures (possibly created by different Executors) to
iterate over.
timeout: The maximum number of seconds to wait. If None, then there
is no limit on the wait time.
Returns:
An iterator that yields the given Futures as they complete (finished or
cancelled).
Raises:
TimeoutError: If the entire result iterator could not be generated
before the given timeout.
"""
if timeout is not None:
end_time = timeout + time.time()
with _AcquireFutures(fs):
finished = set(
f for f in fs
if f._state in [CANCELLED_AND_NOTIFIED, FINISHED])
pending = set(fs) - finished
waiter = _create_and_install_waiters(fs, _AS_COMPLETED)
try:
for future in finished:
yield future
while pending:
if timeout is None:
wait_timeout = None
else:
wait_timeout = end_time - time.time()
if wait_timeout < 0:
raise TimeoutError(
'%d (of %d) futures unfinished' % (
len(pending), len(fs)))
waiter.event.wait(wait_timeout)
with waiter.lock:
finished = waiter.finished_futures
waiter.finished_futures = []
waiter.event.clear()
for future in finished:
yield future
pending.remove(future)
finally:
for f in fs:
f._waiters.remove(waiter)
DoneAndNotDoneFutures = namedtuple(
'DoneAndNotDoneFutures', 'done not_done')
def wait(fs, timeout=None, return_when=ALL_COMPLETED):
"""Wait for the futures in the given sequence to complete.
Args:
fs: The sequence of Futures (possibly created by different Executors) to
wait upon.
timeout: The maximum number of seconds to wait. If None, then there
is no limit on the wait time.
return_when: Indicates when this function should return. The options
are:
FIRST_COMPLETED - Return when any future finishes or is
cancelled.
FIRST_EXCEPTION - Return when any future finishes by raising an
exception. If no future raises an exception
then it is equivalent to ALL_COMPLETED.
ALL_COMPLETED - Return when all futures finish or are cancelled.
Returns:
A named 2-tuple of sets. The first set, named 'done', contains the
futures that completed (is finished or cancelled) before the wait
completed. The second set, named 'not_done', contains uncompleted
futures.
"""
with _AcquireFutures(fs):
done = set(f for f in fs
if f._state in [CANCELLED_AND_NOTIFIED, FINISHED])
not_done = set(fs) - done
if (return_when == FIRST_COMPLETED) and done:
return DoneAndNotDoneFutures(done, not_done)
elif (return_when == FIRST_EXCEPTION) and done:
if any(f for f in done
if not f.cancelled() and f.exception() is not None):
return DoneAndNotDoneFutures(done, not_done)
if len(done) == len(fs):
return DoneAndNotDoneFutures(done, not_done)
waiter = _create_and_install_waiters(fs, return_when)
waiter.event.wait(timeout)
for f in fs:
f._waiters.remove(waiter)
done.update(waiter.finished_futures)
return DoneAndNotDoneFutures(done, set(fs) - done)
class Future(object):
"""Represents the result of an asynchronous computation."""
def __init__(self):
"""Initializes the future. Should not be called by clients."""
self._condition = threading.Condition()
self._state = PENDING
self._result = None
self._exception = None
self._traceback = None
self._waiters = []
self._done_callbacks = []
def _invoke_callbacks(self):
for callback in self._done_callbacks:
try:
callback(self)
except Exception:
LOGGER.exception('exception calling callback for %r', self)
def __repr__(self):
with self._condition:
if self._state == FINISHED:
if self._exception:
return '<Future at %s state=%s raised %s>' % (
hex(id(self)),
_STATE_TO_DESCRIPTION_MAP[self._state],
self._exception.__class__.__name__)
else:
return '<Future at %s state=%s returned %s>' % (
hex(id(self)),
_STATE_TO_DESCRIPTION_MAP[self._state],
self._result.__class__.__name__)
return '<Future at %s state=%s>' % (
hex(id(self)),
_STATE_TO_DESCRIPTION_MAP[self._state])
def cancel(self):
"""Cancel the future if possible.
Returns True if the future was cancelled, False otherwise. A future
cannot be cancelled if it is running or has already completed.
"""
with self._condition:
if self._state in [RUNNING, FINISHED]:
return False
if self._state in [CANCELLED, CANCELLED_AND_NOTIFIED]:
return True
self._state = CANCELLED
self._condition.notify_all()
self._invoke_callbacks()
return True
def cancelled(self):
"""Return True if the future has cancelled."""
with self._condition:
return self._state in [CANCELLED, CANCELLED_AND_NOTIFIED]
def running(self):
"""Return True if the future is currently executing."""
with self._condition:
return self._state == RUNNING
def done(self):
"""Return True of the future was cancelled or finished executing."""
with self._condition:
return self._state in [CANCELLED, CANCELLED_AND_NOTIFIED, FINISHED]
def __get_result(self):
if self._exception:
reraise(self._exception, self._traceback)
else:
return self._result
def add_done_callback(self, fn):
"""Attaches a callable that will be called when the future finishes.
Args:
fn: A callable that will be called with this future as its only
argument when the future completes or is cancelled. The callable
will always be called by a thread in the same process in which
it was added. If the future has already completed or been
cancelled then the callable will be called immediately. These
callables are called in the order that they were added.
"""
with self._condition:
if self._state not in [CANCELLED, CANCELLED_AND_NOTIFIED, FINISHED]:
self._done_callbacks.append(fn)
return
fn(self)
def result(self, timeout=None):
"""Return the result of the call that the future represents.
Args:
timeout: The number of seconds to wait for the result if the future
isn't done. If None, then there is no limit on the wait time.
Returns:
The result of the call that the future represents.
Raises:
CancelledError: If the future was cancelled.
TimeoutError: If the future didn't finish executing before the given
timeout.
Exception: If the call raised then that exception will be raised.
"""
with self._condition:
if self._state in [CANCELLED, CANCELLED_AND_NOTIFIED]:
raise CancelledError()
elif self._state == FINISHED:
return self.__get_result()
self._condition.wait(timeout)
if self._state in [CANCELLED, CANCELLED_AND_NOTIFIED]:
raise CancelledError()
elif self._state == FINISHED:
return self.__get_result()
else:
raise TimeoutError()
def exception_info(self, timeout=None):
"""Return a tuple of (exception, traceback) raised by the call that the
future represents.
Args:
timeout: The number of seconds to wait for the exception if the
future isn't done. If None, then there is no limit on the wait
time.
Returns:
The exception raised by the call that the future represents or None
if the call completed without raising.
Raises:
CancelledError: If the future was cancelled.
TimeoutError: If the future didn't finish executing before the given
timeout.
"""
with self._condition:
if self._state in [CANCELLED, CANCELLED_AND_NOTIFIED]:
raise CancelledError()
elif self._state == FINISHED:
return self._exception, self._traceback
self._condition.wait(timeout)
if self._state in [CANCELLED, CANCELLED_AND_NOTIFIED]:
raise CancelledError()
elif self._state == FINISHED:
return self._exception, self._traceback
else:
raise TimeoutError()
def exception(self, timeout=None):
"""Return the exception raised by the call that the future represents.
Args:
timeout: The number of seconds to wait for the exception if the
future isn't done. If None, then there is no limit on the wait
time.
Returns:
The exception raised by the call that the future represents or None
if the call completed without raising.
Raises:
CancelledError: If the future was cancelled.
TimeoutError: If the future didn't finish executing before the given
timeout.
"""
return self.exception_info(timeout)[0]
# The following methods should only be used by Executors and in tests.
def set_running_or_notify_cancel(self):
"""Mark the future as running or process any cancel notifications.
Should only be used by Executor implementations and unit tests.
If the future has been cancelled (cancel() was called and returned
True) then any threads waiting on the future completing (though calls
to as_completed() or wait()) are notified and False is returned.
If the future was not cancelled then it is put in the running state
(future calls to running() will return True) and True is returned.
This method should be called by Executor implementations before
executing the work associated with this future. If this method returns
False then the work should not be executed.
Returns:
False if the Future was cancelled, True otherwise.
Raises:
RuntimeError: if this method was already called or if set_result()
or set_exception() was called.
"""
with self._condition:
if self._state == CANCELLED:
self._state = CANCELLED_AND_NOTIFIED
for waiter in self._waiters:
waiter.add_cancelled(self)
# self._condition.notify_all() is not necessary because
# self.cancel() triggers a notification.
return False
elif self._state == PENDING:
self._state = RUNNING
return True
else:
LOGGER.critical('Future %s in unexpected state: %s',
id(self.future),
self.future._state)
raise RuntimeError('Future in unexpected state')
def set_result(self, result):
"""Sets the return value of work associated with the future.
Should only be used by Executor implementations and unit tests.
"""
with self._condition:
self._result = result
self._state = FINISHED
for waiter in self._waiters:
waiter.add_result(self)
self._condition.notify_all()
self._invoke_callbacks()
def set_exception_info(self, exception, traceback):
"""Sets the result of the future as being the given exception
and traceback.
Should only be used by Executor implementations and unit tests.
"""
with self._condition:
self._exception = exception
self._traceback = traceback
self._state = FINISHED
for waiter in self._waiters:
waiter.add_exception(self)
self._condition.notify_all()
self._invoke_callbacks()
def set_exception(self, exception):
"""Sets the result of the future as being the given exception.
Should only be used by Executor implementations and unit tests.
"""
self.set_exception_info(exception, None)
class Executor(object):
"""This is an abstract base class for concrete asynchronous executors."""
def submit(self, fn, *args, **kwargs):
"""Submits a callable to be executed with the given arguments.
Schedules the callable to be executed as fn(*args, **kwargs) and returns
a Future instance representing the execution of the callable.
Returns:
A Future representing the given call.
"""
raise NotImplementedError()
def map(self, fn, *iterables, **kwargs):
"""Returns a iterator equivalent to map(fn, iter).
Args:
fn: A callable that will take as many arguments as there are
passed iterables.
timeout: The maximum number of seconds to wait. If None, then there
is no limit on the wait time.
Returns:
An iterator equivalent to: map(func, *iterables) but the calls may
be evaluated out-of-order.
Raises:
TimeoutError: If the entire result iterator could not be generated
before the given timeout.
Exception: If fn(*args) raises for any values.
"""
timeout = kwargs.get('timeout')
if timeout is not None:
end_time = timeout + time.time()
fs = [self.submit(fn, *args) for args in zip(*iterables)]
try:
for future in fs:
if timeout is None:
yield future.result()
else:
yield future.result(end_time - time.time())
finally:
for future in fs:
future.cancel()
def shutdown(self, wait=True):
"""Clean-up the resources associated with the Executor.
It is safe to call this method several times. Otherwise, no other
methods can be called after this one.
Args:
wait: If True then shutdown will not return until all running
futures have finished executing and the resources used by the
executor have been reclaimed.
"""
pass
def __enter__(self):
return self
def __exit__(self, exc_type, exc_val, exc_tb):
self.shutdown(wait=True)
return False

111
lib/concurrent/futures/_compat.py
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from keyword import iskeyword as _iskeyword
from operator import itemgetter as _itemgetter
import sys as _sys
def namedtuple(typename, field_names):
"""Returns a new subclass of tuple with named fields.
>>> Point = namedtuple('Point', 'x y')
>>> Point.__doc__ # docstring for the new class
'Point(x, y)'
>>> p = Point(11, y=22) # instantiate with positional args or keywords
>>> p[0] + p[1] # indexable like a plain tuple
33
>>> x, y = p # unpack like a regular tuple
>>> x, y
(11, 22)
>>> p.x + p.y # fields also accessable by name
33
>>> d = p._asdict() # convert to a dictionary
>>> d['x']
11
>>> Point(**d) # convert from a dictionary
Point(x=11, y=22)
>>> p._replace(x=100) # _replace() is like str.replace() but targets named fields
Point(x=100, y=22)
"""
# Parse and validate the field names. Validation serves two purposes,
# generating informative error messages and preventing template injection attacks.
if isinstance(field_names, basestring):
field_names = field_names.replace(',', ' ').split() # names separated by whitespace and/or commas
field_names = tuple(map(str, field_names))
for name in (typename,) + field_names:
if not all(c.isalnum() or c=='_' for c in name):
raise ValueError('Type names and field names can only contain alphanumeric characters and underscores: %r' % name)
if _iskeyword(name):
raise ValueError('Type names and field names cannot be a keyword: %r' % name)
if name[0].isdigit():
raise ValueError('Type names and field names cannot start with a number: %r' % name)
seen_names = set()
for name in field_names:
if name.startswith('_'):
raise ValueError('Field names cannot start with an underscore: %r' % name)
if name in seen_names:
raise ValueError('Encountered duplicate field name: %r' % name)
seen_names.add(name)
# Create and fill-in the class template
numfields = len(field_names)
argtxt = repr(field_names).replace("'", "")[1:-1] # tuple repr without parens or quotes
reprtxt = ', '.join('%s=%%r' % name for name in field_names)
dicttxt = ', '.join('%r: t[%d]' % (name, pos) for pos, name in enumerate(field_names))
template = '''class %(typename)s(tuple):
'%(typename)s(%(argtxt)s)' \n
__slots__ = () \n
_fields = %(field_names)r \n
def __new__(_cls, %(argtxt)s):
return _tuple.__new__(_cls, (%(argtxt)s)) \n
@classmethod
def _make(cls, iterable, new=tuple.__new__, len=len):
'Make a new %(typename)s object from a sequence or iterable'
result = new(cls, iterable)
if len(result) != %(numfields)d:
raise TypeError('Expected %(numfields)d arguments, got %%d' %% len(result))
return result \n
def __repr__(self):
return '%(typename)s(%(reprtxt)s)' %% self \n
def _asdict(t):
'Return a new dict which maps field names to their values'
return {%(dicttxt)s} \n
def _replace(_self, **kwds):
'Return a new %(typename)s object replacing specified fields with new values'
result = _self._make(map(kwds.pop, %(field_names)r, _self))
if kwds:
raise ValueError('Got unexpected field names: %%r' %% kwds.keys())
return result \n
def __getnewargs__(self):
return tuple(self) \n\n''' % locals()
for i, name in enumerate(field_names):
template += ' %s = _property(_itemgetter(%d))\n' % (name, i)
# Execute the template string in a temporary namespace and
# support tracing utilities by setting a value for frame.f_globals['__name__']
namespace = dict(_itemgetter=_itemgetter, __name__='namedtuple_%s' % typename,
_property=property, _tuple=tuple)
try:
exec(template, namespace)
except SyntaxError:
e = _sys.exc_info()[1]
raise SyntaxError(e.message + ':\n' + template)
result = namespace[typename]
# For pickling to work, the __module__ variable needs to be set to the frame
# where the named tuple is created. Bypass this step in enviroments where
# sys._getframe is not defined (Jython for example).
if hasattr(_sys, '_getframe'):
result.__module__ = _sys._getframe(1).f_globals.get('__name__', '__main__')
return result
if _sys.version_info[0] < 3:
def reraise(exc, traceback):
locals_ = {'exc_type': type(exc), 'exc_value': exc, 'traceback': traceback}
exec('raise exc_type, exc_value, traceback', {}, locals_)
else:
def reraise(exc, traceback):
# Tracebacks are embedded in exceptions in Python 3
raise exc

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lib/concurrent/futures/process.py
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# Copyright 2009 Brian Quinlan. All Rights Reserved.
# Licensed to PSF under a Contributor Agreement.
"""Implements ProcessPoolExecutor.
The follow diagram and text describe the data-flow through the system:
|======================= In-process =====================|== Out-of-process ==|
+----------+ +----------+ +--------+ +-----------+ +---------+
| | => | Work Ids | => | | => | Call Q | => | |
| | +----------+ | | +-----------+ | |
| | | ... | | | | ... | | |
| | | 6 | | | | 5, call() | | |
| | | 7 | | | | ... | | |
| Process | | ... | | Local | +-----------+ | Process |
| Pool | +----------+ | Worker | | #1..n |
| Executor | | Thread | | |
| | +----------- + | | +-----------+ | |
| | <=> | Work Items | <=> | | <= | Result Q | <= | |
| | +------------+ | | +-----------+ | |
| | | 6: call() | | | | ... | | |
| | | future | | | | 4, result | | |
| | | ... | | | | 3, except | | |
+----------+ +------------+ +--------+ +-----------+ +---------+
Executor.submit() called:
- creates a uniquely numbered _WorkItem and adds it to the "Work Items" dict
- adds the id of the _WorkItem to the "Work Ids" queue
Local worker thread:
- reads work ids from the "Work Ids" queue and looks up the corresponding
WorkItem from the "Work Items" dict: if the work item has been cancelled then
it is simply removed from the dict, otherwise it is repackaged as a
_CallItem and put in the "Call Q". New _CallItems are put in the "Call Q"
until "Call Q" is full. NOTE: the size of the "Call Q" is kept small because
calls placed in the "Call Q" can no longer be cancelled with Future.cancel().
- reads _ResultItems from "Result Q", updates the future stored in the
"Work Items" dict and deletes the dict entry
Process #1..n:
- reads _CallItems from "Call Q", executes the calls, and puts the resulting
_ResultItems in "Request Q"
"""
from __future__ import with_statement
import atexit
import multiprocessing
import threading
import weakref
import sys
from concurrent.futures import _base
try:
import queue
except ImportError:
import Queue as queue
__author__ = 'Brian Quinlan (brian@sweetapp.com)'
# Workers are created as daemon threads and processes. This is done to allow the
# interpreter to exit when there are still idle processes in a
# ProcessPoolExecutor's process pool (i.e. shutdown() was not called). However,
# allowing workers to die with the interpreter has two undesirable properties:
# - The workers would still be running during interpretor shutdown,
# meaning that they would fail in unpredictable ways.
# - The workers could be killed while evaluating a work item, which could
# be bad if the callable being evaluated has external side-effects e.g.
# writing to a file.
#
# To work around this problem, an exit handler is installed which tells the
# workers to exit when their work queues are empty and then waits until the
# threads/processes finish.
_threads_queues = weakref.WeakKeyDictionary()
_shutdown = False
def _python_exit():
global _shutdown
_shutdown = True
items = list(_threads_queues.items())
for t, q in items:
q.put(None)
for t, q in items:
t.join()
# Controls how many more calls than processes will be queued in the call queue.
# A smaller number will mean that processes spend more time idle waiting for
# work while a larger number will make Future.cancel() succeed less frequently
# (Futures in the call queue cannot be cancelled).
EXTRA_QUEUED_CALLS = 1
class _WorkItem(object):
def __init__(self, future, fn, args, kwargs):
self.future = future
self.fn = fn
self.args = args
self.kwargs = kwargs
class _ResultItem(object):
def __init__(self, work_id, exception=None, result=None):
self.work_id = work_id
self.exception = exception
self.result = result
class _CallItem(object):
def __init__(self, work_id, fn, args, kwargs):
self.work_id = work_id
self.fn = fn
self.args = args
self.kwargs = kwargs
def _process_worker(call_queue, result_queue):
"""Evaluates calls from call_queue and places the results in result_queue.
This worker is run in a separate process.
Args:
call_queue: A multiprocessing.Queue of _CallItems that will be read and
evaluated by the worker.
result_queue: A multiprocessing.Queue of _ResultItems that will written
to by the worker.
shutdown: A multiprocessing.Event that will be set as a signal to the
worker that it should exit when call_queue is empty.
"""
while True:
call_item = call_queue.get(block=True)
if call_item is None:
# Wake up queue management thread
result_queue.put(None)
return
try:
r = call_item.fn(*call_item.args, **call_item.kwargs)
except BaseException:
e = sys.exc_info()[1]
result_queue.put(_ResultItem(call_item.work_id,
exception=e))
else:
result_queue.put(_ResultItem(call_item.work_id,
result=r))
def _add_call_item_to_queue(pending_work_items,
work_ids,
call_queue):
"""Fills call_queue with _WorkItems from pending_work_items.
This function never blocks.
Args:
pending_work_items: A dict mapping work ids to _WorkItems e.g.
{5: <_WorkItem...>, 6: <_WorkItem...>, ...}
work_ids: A queue.Queue of work ids e.g. Queue([5, 6, ...]). Work ids
are consumed and the corresponding _WorkItems from
pending_work_items are transformed into _CallItems and put in
call_queue.
call_queue: A multiprocessing.Queue that will be filled with _CallItems
derived from _WorkItems.
"""
while True:
if call_queue.full():
return
try:
work_id = work_ids.get(block=False)
except queue.Empty:
return
else:
work_item = pending_work_items[work_id]
if work_item.future.set_running_or_notify_cancel():
call_queue.put(_CallItem(work_id,
work_item.fn,
work_item.args,
work_item.kwargs),
block=True)
else:
del pending_work_items[work_id]
continue
def _queue_management_worker(executor_reference,
processes,
pending_work_items,
work_ids_queue,
call_queue,
result_queue):
"""Manages the communication between this process and the worker processes.
This function is run in a local thread.
Args:
executor_reference: A weakref.ref to the ProcessPoolExecutor that owns
this thread. Used to determine if the ProcessPoolExecutor has been
garbage collected and that this function can exit.
process: A list of the multiprocessing.Process instances used as
workers.
pending_work_items: A dict mapping work ids to _WorkItems e.g.
{5: <_WorkItem...>, 6: <_WorkItem...>, ...}
work_ids_queue: A queue.Queue of work ids e.g. Queue([5, 6, ...]).
call_queue: A multiprocessing.Queue that will be filled with _CallItems
derived from _WorkItems for processing by the process workers.
result_queue: A multiprocessing.Queue of _ResultItems generated by the
process workers.
"""
nb_shutdown_processes = [0]
def shutdown_one_process():
"""Tell a worker to terminate, which will in turn wake us again"""
call_queue.put(None)
nb_shutdown_processes[0] += 1
while True:
_add_call_item_to_queue(pending_work_items,
work_ids_queue,
call_queue)
result_item = result_queue.get(block=True)
if result_item is not None:
work_item = pending_work_items[result_item.work_id]
del pending_work_items[result_item.work_id]
if result_item.exception:
work_item.future.set_exception(result_item.exception)
else:
work_item.future.set_result(result_item.result)
# Check whether we should start shutting down.
executor = executor_reference()
# No more work items can be added if:
# - The interpreter is shutting down OR
# - The executor that owns this worker has been collected OR
# - The executor that owns this worker has been shutdown.
if _shutdown or executor is None or executor._shutdown_thread:
# Since no new work items can be added, it is safe to shutdown
# this thread if there are no pending work items.
if not pending_work_items:
while nb_shutdown_processes[0] < len(processes):
shutdown_one_process()
# If .join() is not called on the created processes then
# some multiprocessing.Queue methods may deadlock on Mac OS
# X.
for p in processes:
p.join()
call_queue.close()
return
del executor
_system_limits_checked = False
_system_limited = None
def _check_system_limits():
global _system_limits_checked, _system_limited
if _system_limits_checked:
if _system_limited:
raise NotImplementedError(_system_limited)
_system_limits_checked = True
try:
import os
nsems_max = os.sysconf("SC_SEM_NSEMS_MAX")
except (AttributeError, ValueError):
# sysconf not available or setting not available
return
if nsems_max == -1:
# indetermine limit, assume that limit is determined
# by available memory only
return
if nsems_max >= 256:
# minimum number of semaphores available
# according to POSIX
return
_system_limited = "system provides too few semaphores (%d available, 256 necessary)" % nsems_max
raise NotImplementedError(_system_limited)
class ProcessPoolExecutor(_base.Executor):
def __init__(self, max_workers=None):
"""Initializes a new ProcessPoolExecutor instance.
Args:
max_workers: The maximum number of processes that can be used to
execute the given calls. If None or not given then as many
worker processes will be created as the machine has processors.
"""
_check_system_limits()
if max_workers is None:
self._max_workers = multiprocessing.cpu_count()
else:
self._max_workers = max_workers
# Make the call queue slightly larger than the number of processes to
# prevent the worker processes from idling. But don't make it too big
# because futures in the call queue cannot be cancelled.
self._call_queue = multiprocessing.Queue(self._max_workers +
EXTRA_QUEUED_CALLS)
self._result_queue = multiprocessing.Queue()
self._work_ids = queue.Queue()
self._queue_management_thread = None
self._processes = set()
# Shutdown is a two-step process.
self._shutdown_thread = False
self._shutdown_lock = threading.Lock()
self._queue_count = 0
self._pending_work_items = {}
def _start_queue_management_thread(self):
# When the executor gets lost, the weakref callback will wake up
# the queue management thread.
def weakref_cb(_, q=self._result_queue):
q.put(None)
if self._queue_management_thread is None:
self._queue_management_thread = threading.Thread(
target=_queue_management_worker,
args=(weakref.ref(self, weakref_cb),
self._processes,
self._pending_work_items,
self._work_ids,
self._call_queue,
self._result_queue))
self._queue_management_thread.daemon = True
self._queue_management_thread.start()
_threads_queues[self._queue_management_thread] = self._result_queue
def _adjust_process_count(self):
for _ in range(len(self._processes), self._max_workers):
p = multiprocessing.Process(
target=_process_worker,
args=(self._call_queue,
self._result_queue))
p.start()
self._processes.add(p)
def submit(self, fn, *args, **kwargs):
with self._shutdown_lock:
if self._shutdown_thread:
raise RuntimeError('cannot schedule new futures after shutdown')
f = _base.Future()
w = _WorkItem(f, fn, args, kwargs)
self._pending_work_items[self._queue_count] = w
self._work_ids.put(self._queue_count)
self._queue_count += 1
# Wake up queue management thread
self._result_queue.put(None)
self._start_queue_management_thread()
self._adjust_process_count()
return f
submit.__doc__ = _base.Executor.submit.__doc__
def shutdown(self, wait=True):
with self._shutdown_lock:
self._shutdown_thread = True
if self._queue_management_thread:
# Wake up queue management thread
self._result_queue.put(None)
if wait:
self._queue_management_thread.join()
# To reduce the risk of openning too many files, remove references to
# objects that use file descriptors.
self._queue_management_thread = None
self._call_queue = None
self._result_queue = None
self._processes = None
shutdown.__doc__ = _base.Executor.shutdown.__doc__
atexit.register(_python_exit)

138
lib/concurrent/futures/thread.py
View file

@ -1,138 +0,0 @@
# Copyright 2009 Brian Quinlan. All Rights Reserved.
# Licensed to PSF under a Contributor Agreement.
"""Implements ThreadPoolExecutor."""
from __future__ import with_statement
import atexit
import threading
import weakref
import sys
from concurrent.futures import _base
try:
import queue
except ImportError:
import Queue as queue
__author__ = 'Brian Quinlan (brian@sweetapp.com)'
# Workers are created as daemon threads. This is done to allow the interpreter
# to exit when there are still idle threads in a ThreadPoolExecutor's thread
# pool (i.e. shutdown() was not called). However, allowing workers to die with
# the interpreter has two undesirable properties:
# - The workers would still be running during interpretor shutdown,
# meaning that they would fail in unpredictable ways.
# - The workers could be killed while evaluating a work item, which could
# be bad if the callable being evaluated has external side-effects e.g.
# writing to a file.
#
# To work around this problem, an exit handler is installed which tells the
# workers to exit when their work queues are empty and then waits until the
# threads finish.
_threads_queues = weakref.WeakKeyDictionary()
_shutdown = False
def _python_exit():
global _shutdown
_shutdown = True
items = list(_threads_queues.items())
for t, q in items:
q.put(None)
for t, q in items:
t.join()
atexit.register(_python_exit)
class _WorkItem(object):
def __init__(self, future, fn, args, kwargs):
self.future = future
self.fn = fn
self.args = args
self.kwargs = kwargs
def run(self):
if not self.future.set_running_or_notify_cancel():
return
try:
result = self.fn(*self.args, **self.kwargs)
except BaseException:
e, tb = sys.exc_info()[1:]
self.future.set_exception_info(e, tb)
else:
self.future.set_result(result)
def _worker(executor_reference, work_queue):
try:
while True:
work_item = work_queue.get(block=True)
if work_item is not None:
work_item.run()
continue
executor = executor_reference()
# Exit if:
# - The interpreter is shutting down OR
# - The executor that owns the worker has been collected OR
# - The executor that owns the worker has been shutdown.
if _shutdown or executor is None or executor._shutdown:
# Notice other workers
work_queue.put(None)
return
del executor
except BaseException:
_base.LOGGER.critical('Exception in worker', exc_info=True)
class ThreadPoolExecutor(_base.Executor):
def __init__(self, max_workers):
"""Initializes a new ThreadPoolExecutor instance.
Args:
max_workers: The maximum number of threads that can be used to
execute the given calls.
"""
self._max_workers = max_workers
self._work_queue = queue.Queue()
self._threads = set()
self._shutdown = False
self._shutdown_lock = threading.Lock()
def submit(self, fn, *args, **kwargs):
with self._shutdown_lock:
if self._shutdown:
raise RuntimeError('cannot schedule new futures after shutdown')
f = _base.Future()
w = _WorkItem(f, fn, args, kwargs)
self._work_queue.put(w)
self._adjust_thread_count()
return f
submit.__doc__ = _base.Executor.submit.__doc__
def _adjust_thread_count(self):
# When the executor gets lost, the weakref callback will wake up
# the worker threads.
def weakref_cb(_, q=self._work_queue):
q.put(None)
# TODO(bquinlan): Should avoid creating new threads if there are more
# idle threads than items in the work queue.
if len(self._threads) < self._max_workers:
t = threading.Thread(target=_worker,
args=(weakref.ref(self, weakref_cb),
self._work_queue))
t.daemon = True
t.start()
self._threads.add(t)
_threads_queues[t] = self._work_queue
def shutdown(self, wait=True):
with self._shutdown_lock:
self._shutdown = True
self._work_queue.put(None)
if wait:
for t in self._threads:
t.join()
shutdown.__doc__ = _base.Executor.shutdown.__doc__

829
lib/funcsigs/__init__.py
View file

@ -1,829 +0,0 @@
# Copyright 2001-2013 Python Software Foundation; All Rights Reserved
"""Function signature objects for callables
Back port of Python 3.3's function signature tools from the inspect module,
modified to be compatible with Python 2.6, 2.7 and 3.3+.
"""
from __future__ import absolute_import, division, print_function
import itertools
import functools
import re
import types
try:
from collections import OrderedDict
except ImportError:
from ordereddict import OrderedDict
from funcsigs.version import __version__
__all__ = ['BoundArguments', 'Parameter', 'Signature', 'signature']
_WrapperDescriptor = type(type.__call__)
_MethodWrapper = type(all.__call__)
_NonUserDefinedCallables = (_WrapperDescriptor,
_MethodWrapper,
types.BuiltinFunctionType)
def formatannotation(annotation, base_module=None):
if isinstance(annotation, type):
if annotation.__module__ in ('builtins', '__builtin__', base_module):
return annotation.__name__
return annotation.__module__+'.'+annotation.__name__
return repr(annotation)
def _get_user_defined_method(cls, method_name, *nested):
try:
if cls is type:
return
meth = getattr(cls, method_name)
for name in nested:
meth = getattr(meth, name, meth)
except AttributeError:
return
else:
if not isinstance(meth, _NonUserDefinedCallables):
# Once '__signature__' will be added to 'C'-level
# callables, this check won't be necessary
return meth
def signature(obj):
'''Get a signature object for the passed callable.'''
if not callable(obj):
raise TypeError('{0!r} is not a callable object'.format(obj))
if isinstance(obj, types.MethodType):
sig = signature(obj.__func__)
if obj.__self__ is None:
# Unbound method - preserve as-is.
return sig
else:
# Bound method. Eat self - if we can.
params = tuple(sig.parameters.values())
if not params or params[0].kind in (_VAR_KEYWORD, _KEYWORD_ONLY):
raise ValueError('invalid method signature')
kind = params[0].kind
if kind in (_POSITIONAL_OR_KEYWORD, _POSITIONAL_ONLY):
# Drop first parameter:
# '(p1, p2[, ...])' -> '(p2[, ...])'
params = params[1:]
else:
if kind is not _VAR_POSITIONAL:
# Unless we add a new parameter type we never
# get here
raise ValueError('invalid argument type')
# It's a var-positional parameter.
# Do nothing. '(*args[, ...])' -> '(*args[, ...])'
return sig.replace(parameters=params)
try:
sig = obj.__signature__
except AttributeError:
pass
else:
if sig is not None:
return sig
try:
# Was this function wrapped by a decorator?
wrapped = obj.__wrapped__
except AttributeError:
pass
else:
return signature(wrapped)
if isinstance(obj, types.FunctionType):
return Signature.from_function(obj)
if isinstance(obj, functools.partial):
sig = signature(obj.func)
new_params = OrderedDict(sig.parameters.items())
partial_args = obj.args or ()
partial_keywords = obj.keywords or {}
try:
ba = sig.bind_partial(*partial_args, **partial_keywords)
except TypeError as ex:
msg = 'partial object {0!r} has incorrect arguments'.format(obj)
raise ValueError(msg)
for arg_name, arg_value in ba.arguments.items():
param = new_params[arg_name]
if arg_name in partial_keywords:
# We set a new default value, because the following code
# is correct:
#
# >>> def foo(a): print(a)
# >>> print(partial(partial(foo, a=10), a=20)())
# 20
# >>> print(partial(partial(foo, a=10), a=20)(a=30))
# 30
#
# So, with 'partial' objects, passing a keyword argument is
# like setting a new default value for the corresponding
# parameter
#
# We also mark this parameter with '_partial_kwarg'
# flag. Later, in '_bind', the 'default' value of this
# parameter will be added to 'kwargs', to simulate
# the 'functools.partial' real call.
new_params[arg_name] = param.replace(default=arg_value,
_partial_kwarg=True)
elif (param.kind not in (_VAR_KEYWORD, _VAR_POSITIONAL) and
not param._partial_kwarg):
new_params.pop(arg_name)
return sig.replace(parameters=new_params.values())
sig = None
if isinstance(obj, type):
# obj is a class or a metaclass
# First, let's see if it has an overloaded __call__ defined
# in its metaclass
call = _get_user_defined_method(type(obj), '__call__')
if call is not None:
sig = signature(call)
else:
# Now we check if the 'obj' class has a '__new__' method
new = _get_user_defined_method(obj, '__new__')
if new is not None:
sig = signature(new)
else:
# Finally, we should have at least __init__ implemented
init = _get_user_defined_method(obj, '__init__')
if init is not None:
sig = signature(init)
elif not isinstance(obj, _NonUserDefinedCallables):
# An object with __call__
# We also check that the 'obj' is not an instance of
# _WrapperDescriptor or _MethodWrapper to avoid
# infinite recursion (and even potential segfault)
call = _get_user_defined_method(type(obj), '__call__', 'im_func')
if call is not None:
sig = signature(call)
if sig is not None:
# For classes and objects we skip the first parameter of their
# __call__, __new__, or __init__ methods
return sig.replace(parameters=tuple(sig.parameters.values())[1:])
if isinstance(obj, types.BuiltinFunctionType):
# Raise a nicer error message for builtins
msg = 'no signature found for builtin function {0!r}'.format(obj)
raise ValueError(msg)
raise ValueError('callable {0!r} is not supported by signature'.format(obj))
class _void(object):
'''A private marker - used in Parameter & Signature'''
class _empty(object):
pass
class _ParameterKind(int):
def __new__(self, *args, **kwargs):
obj = int.__new__(self, *args)
obj._name = kwargs['name']
return obj
def __str__(self):
return self._name
def __repr__(self):
return '<_ParameterKind: {0!r}>'.format(self._name)
_POSITIONAL_ONLY = _ParameterKind(0, name='POSITIONAL_ONLY')
_POSITIONAL_OR_KEYWORD = _ParameterKind(1, name='POSITIONAL_OR_KEYWORD')
_VAR_POSITIONAL = _ParameterKind(2, name='VAR_POSITIONAL')
_KEYWORD_ONLY = _ParameterKind(3, name='KEYWORD_ONLY')
_VAR_KEYWORD = _ParameterKind(4, name='VAR_KEYWORD')
class Parameter(object):
'''Represents a parameter in a function signature.
Has the following public attributes:
* name : str
The name of the parameter as a string.
* default : object
The default value for the parameter if specified. If the
parameter has no default value, this attribute is not set.
* annotation
The annotation for the parameter if specified. If the
parameter has no annotation, this attribute is not set.
* kind : str
Describes how argument values are bound to the parameter.
Possible values: `Parameter.POSITIONAL_ONLY`,
`Parameter.POSITIONAL_OR_KEYWORD`, `Parameter.VAR_POSITIONAL`,
`Parameter.KEYWORD_ONLY`, `Parameter.VAR_KEYWORD`.
'''
__slots__ = ('_name', '_kind', '_default', '_annotation', '_partial_kwarg')
POSITIONAL_ONLY = _POSITIONAL_ONLY
POSITIONAL_OR_KEYWORD = _POSITIONAL_OR_KEYWORD
VAR_POSITIONAL = _VAR_POSITIONAL
KEYWORD_ONLY = _KEYWORD_ONLY
VAR_KEYWORD = _VAR_KEYWORD
empty = _empty
def __init__(self, name, kind, default=_empty, annotation=_empty,
_partial_kwarg=False):
if kind not in (_POSITIONAL_ONLY, _POSITIONAL_OR_KEYWORD,
_VAR_POSITIONAL, _KEYWORD_ONLY, _VAR_KEYWORD):
raise ValueError("invalid value for 'Parameter.kind' attribute")
self._kind = kind
if default is not _empty:
if kind in (_VAR_POSITIONAL, _VAR_KEYWORD):
msg = '{0} parameters cannot have default values'.format(kind)
raise ValueError(msg)
self._default = default
self._annotation = annotation
if name is None:
if kind != _POSITIONAL_ONLY:
raise ValueError("None is not a valid name for a "
"non-positional-only parameter")
self._name = name
else:
name = str(name)
if kind != _POSITIONAL_ONLY and not re.match(r'[a-z_]\w*$', name, re.I):
msg = '{0!r} is not a valid parameter name'.format(name)
raise ValueError(msg)
self._name = name
self._partial_kwarg = _partial_kwarg
@property
def name(self):
return self._name
@property
def default(self):
return self._default
@property
def annotation(self):
return self._annotation
@property
def kind(self):
return self._kind
def replace(self, name=_void, kind=_void, annotation=_void,
default=_void, _partial_kwarg=_void):
'''Creates a customized copy of the Parameter.'''
if name is _void:
name = self._name
if kind is _void:
kind = self._kind
if annotation is _void:
annotation = self._annotation
if default is _void:
default = self._default
if _partial_kwarg is _void:
_partial_kwarg = self._partial_kwarg
return type(self)(name, kind, default=default, annotation=annotation,
_partial_kwarg=_partial_kwarg)
def __str__(self):
kind = self.kind
formatted = self._name
if kind == _POSITIONAL_ONLY:
if formatted is None:
formatted = ''
formatted = '<{0}>'.format(formatted)
# Add annotation and default value
if self._annotation is not _empty:
formatted = '{0}:{1}'.format(formatted,
formatannotation(self._annotation))
if self._default is not _empty:
formatted = '{0}={1}'.format(formatted, repr(self._default))
if kind == _VAR_POSITIONAL:
formatted = '*' + formatted
elif kind == _VAR_KEYWORD:
formatted = '**' + formatted
return formatted
def __repr__(self):
return '<{0} at {1:#x} {2!r}>'.format(self.__class__.__name__,
id(self), self.name)
def __hash__(self):
msg = "unhashable type: '{0}'".format(self.__class__.__name__)
raise TypeError(msg)
def __eq__(self, other):
return (issubclass(other.__class__, Parameter) and
self._name == other._name and
self._kind == other._kind and
self._default == other._default and
self._annotation == other._annotation)
def __ne__(self, other):
return not self.__eq__(other)
class BoundArguments(object):
'''Result of `Signature.bind` call. Holds the mapping of arguments
to the function's parameters.
Has the following public attributes:
* arguments : OrderedDict
An ordered mutable mapping of parameters' names to arguments' values.
Does not contain arguments' default values.
* signature : Signature
The Signature object that created this instance.
* args : tuple
Tuple of positional arguments values.
* kwargs : dict
Dict of keyword arguments values.
'''
def __init__(self, signature, arguments):
self.arguments = arguments
self._signature = signature
@property
def signature(self):
return self._signature
@property
def args(self):
args = []
for param_name, param in self._signature.parameters.items():
if (param.kind in (_VAR_KEYWORD, _KEYWORD_ONLY) or
param._partial_kwarg):
# Keyword arguments mapped by 'functools.partial'
# (Parameter._partial_kwarg is True) are mapped
# in 'BoundArguments.kwargs', along with VAR_KEYWORD &
# KEYWORD_ONLY
break
try:
arg = self.arguments[param_name]
except KeyError:
# We're done here. Other arguments
# will be mapped in 'BoundArguments.kwargs'
break
else:
if param.kind == _VAR_POSITIONAL:
# *args
args.extend(arg)
else:
# plain argument
args.append(arg)
return tuple(args)
@property
def kwargs(self):
kwargs = {}
kwargs_started = False
for param_name, param in self._signature.parameters.items():
if not kwargs_started:
if (param.kind in (_VAR_KEYWORD, _KEYWORD_ONLY) or
param._partial_kwarg):
kwargs_started = True
else:
if param_name not in self.arguments:
kwargs_started = True
continue
if not kwargs_started:
continue
try:
arg = self.arguments[param_name]
except KeyError:
pass
else:
if param.kind == _VAR_KEYWORD:
# **kwargs
kwargs.update(arg)
else:
# plain keyword argument
kwargs[param_name] = arg
return kwargs
def __hash__(self):
msg = "unhashable type: '{0}'".format(self.__class__.__name__)
raise TypeError(msg)
def __eq__(self, other):
return (issubclass(other.__class__, BoundArguments) and
self.signature == other.signature and
self.arguments == other.arguments)
def __ne__(self, other):
return not self.__eq__(other)
class Signature(object):
'''A Signature object represents the overall signature of a function.
It stores a Parameter object for each parameter accepted by the
function, as well as information specific to the function itself.
A Signature object has the following public attributes and methods:
* parameters : OrderedDict
An ordered mapping of parameters' names to the corresponding
Parameter objects (keyword-only arguments are in the same order
as listed in `code.co_varnames`).
* return_annotation : object
The annotation for the return type of the function if specified.
If the function has no annotation for its return type, this
attribute is not set.
* bind(*args, **kwargs) -> BoundArguments
Creates a mapping from positional and keyword arguments to
parameters.
* bind_partial(*args, **kwargs) -> BoundArguments
Creates a partial mapping from positional and keyword arguments
to parameters (simulating 'functools.partial' behavior.)
'''
__slots__ = ('_return_annotation', '_parameters')
_parameter_cls = Parameter
_bound_arguments_cls = BoundArguments
empty = _empty
def __init__(self, parameters=None, return_annotation=_empty,
__validate_parameters__=True):
'''Constructs Signature from the given list of Parameter
objects and 'return_annotation'. All arguments are optional.
'''
if parameters is None:
params = OrderedDict()
else:
if __validate_parameters__:
params = OrderedDict()
top_kind = _POSITIONAL_ONLY
for idx, param in enumerate(parameters):
kind = param.kind
if kind < top_kind:
msg = 'wrong parameter order: {0} before {1}'
msg = msg.format(top_kind, param.kind)
raise ValueError(msg)
else:
top_kind = kind
name = param.name
if name is None:
name = str(idx)
param = param.replace(name=name)
if name in params:
msg = 'duplicate parameter name: {0!r}'.format(name)
raise ValueError(msg)
params[name] = param
else:
params = OrderedDict(((param.name, param)
for param in parameters))
self._parameters = params
self._return_annotation = return_annotation
@classmethod
def from_function(cls, func):
'''Constructs Signature for the given python function'''
if not isinstance(func, types.FunctionType):
raise TypeError('{0!r} is not a Python function'.format(func))
Parameter = cls._parameter_cls
# Parameter information.
func_code = func.__code__
pos_count = func_code.co_argcount
arg_names = func_code.co_varnames
positional = tuple(arg_names[:pos_count])
keyword_only_count = getattr(func_code, 'co_kwonlyargcount', 0)
keyword_only = arg_names[pos_count:(pos_count + keyword_only_count)]
annotations = getattr(func, '__annotations__', {})
defaults = func.__defaults__
kwdefaults = getattr(func, '__kwdefaults__', None)
if defaults:
pos_default_count = len(defaults)
else:
pos_default_count = 0
parameters = []
# Non-keyword-only parameters w/o defaults.
non_default_count = pos_count - pos_default_count
for name in positional[:non_default_count]:
annotation = annotations.get(name, _empty)
parameters.append(Parameter(name, annotation=annotation,
kind=_POSITIONAL_OR_KEYWORD))
# ... w/ defaults.
for offset, name in enumerate(positional[non_default_count:]):
annotation = annotations.get(name, _empty)
parameters.append(Parameter(name, annotation=annotation,
kind=_POSITIONAL_OR_KEYWORD,
default=defaults[offset]))
# *args
if func_code.co_flags & 0x04:
name = arg_names[pos_count + keyword_only_count]
annotation = annotations.get(name, _empty)
parameters.append(Parameter(name, annotation=annotation,
kind=_VAR_POSITIONAL))
# Keyword-only parameters.
for name in keyword_only:
default = _empty
if kwdefaults is not None:
default = kwdefaults.get(name, _empty)
annotation = annotations.get(name, _empty)
parameters.append(Parameter(name, annotation=annotation,
kind=_KEYWORD_ONLY,
default=default))
# **kwargs
if func_code.co_flags & 0x08:
index = pos_count + keyword_only_count
if func_code.co_flags & 0x04:
index += 1
name = arg_names[index]
annotation = annotations.get(name, _empty)
parameters.append(Parameter(name, annotation=annotation,
kind=_VAR_KEYWORD))
return cls(parameters,
return_annotation=annotations.get('return', _empty),
__validate_parameters__=False)
@property
def parameters(self):
try:
return types.MappingProxyType(self._parameters)
except AttributeError:
return OrderedDict(self._parameters.items())
@property
def return_annotation(self):
return self._return_annotation
def replace(self, parameters=_void, return_annotation=_void):
'''Creates a customized copy of the Signature.
Pass 'parameters' and/or 'return_annotation' arguments
to override them in the new copy.
'''
if parameters is _void:
parameters = self.parameters.values()
if return_annotation is _void:
return_annotation = self._return_annotation
return type(self)(parameters,
return_annotation=return_annotation)
def __hash__(self):
msg = "unhashable type: '{0}'".format(self.__class__.__name__)
raise TypeError(msg)
def __eq__(self, other):
if (not issubclass(type(other), Signature) or
self.return_annotation != other.return_annotation or
len(self.parameters) != len(other.parameters)):
return False
other_positions = dict((param, idx)
for idx, param in enumerate(other.parameters.keys()))
for idx, (param_name, param) in enumerate(self.parameters.items()):
if param.kind == _KEYWORD_ONLY:
try:
other_param = other.parameters[param_name]
except KeyError:
return False
else:
if param != other_param:
return False
else:
try:
other_idx = other_positions[param_name]
except KeyError:
return False
else:
if (idx != other_idx or
param != other.parameters[param_name]):
return False
return True
def __ne__(self, other):
return not self.__eq__(other)
def _bind(self, args, kwargs, partial=False):
'''Private method. Don't use directly.'''
arguments = OrderedDict()
parameters = iter(self.parameters.values())
parameters_ex = ()
arg_vals = iter(args)
if partial:
# Support for binding arguments to 'functools.partial' objects.
# See 'functools.partial' case in 'signature()' implementation
# for details.
for param_name, param in self.parameters.items():
if (param._partial_kwarg and param_name not in kwargs):
# Simulating 'functools.partial' behavior
kwargs[param_name] = param.default
while True:
# Let's iterate through the positional arguments and corresponding
# parameters
try:
arg_val = next(arg_vals)
except StopIteration:
# No more positional arguments
try:
param = next(parameters)
except StopIteration:
# No more parameters. That's it. Just need to check that
# we have no `kwargs` after this while loop
break
else:
if param.kind == _VAR_POSITIONAL:
# That's OK, just empty *args. Let's start parsing
# kwargs
break
elif param.name in kwargs:
if param.kind == _POSITIONAL_ONLY:
msg = '{arg!r} parameter is positional only, ' \
'but was passed as a keyword'
msg = msg.format(arg=param.name)
raise TypeError(msg)
parameters_ex = (param,)
break
elif (param.kind == _VAR_KEYWORD or
param.default is not _empty):
# That's fine too - we have a default value for this
# parameter. So, lets start parsing `kwargs`, starting
# with the current parameter
parameters_ex = (param,)
break
else:
if partial:
parameters_ex = (param,)
break
else:
msg = '{arg!r} parameter lacking default value'
msg = msg.format(arg=param.name)
raise TypeError(msg)
else:
# We have a positional argument to process
try:
param = next(parameters)
except StopIteration:
raise TypeError('too many positional arguments')
else:
if param.kind in (_VAR_KEYWORD, _KEYWORD_ONLY):
# Looks like we have no parameter for this positional
# argument
raise TypeError('too many positional arguments')
if param.kind == _VAR_POSITIONAL:
# We have an '*args'-like argument, let's fill it with
# all positional arguments we have left and move on to
# the next phase
values = [arg_val]
values.extend(arg_vals)
arguments[param.name] = tuple(values)
break
if param.name in kwargs:
raise TypeError('multiple values for argument '
'{arg!r}'.format(arg=param.name))
arguments[param.name] = arg_val
# Now, we iterate through the remaining parameters to process
# keyword arguments
kwargs_param = None
for param in itertools.chain(parameters_ex, parameters):
if param.kind == _POSITIONAL_ONLY:
# This should never happen in case of a properly built
# Signature object (but let's have this check here
# to ensure correct behaviour just in case)
raise TypeError('{arg!r} parameter is positional only, '
'but was passed as a keyword'. \
format(arg=param.name))
if param.kind == _VAR_KEYWORD:
# Memorize that we have a '**kwargs'-like parameter
kwargs_param = param
continue
param_name = param.name
try:
arg_val = kwargs.pop(param_name)
except KeyError:
# We have no value for this parameter. It's fine though,
# if it has a default value, or it is an '*args'-like
# parameter, left alone by the processing of positional
# arguments.
if (not partial and param.kind != _VAR_POSITIONAL and
param.default is _empty):
raise TypeError('{arg!r} parameter lacking default value'. \
format(arg=param_name))
else:
arguments[param_name] = arg_val
if kwargs:
if kwargs_param is not None:
# Process our '**kwargs'-like parameter
arguments[kwargs_param.name] = kwargs
else:
raise TypeError('too many keyword arguments %r' % kwargs)
return self._bound_arguments_cls(self, arguments)
def bind(*args, **kwargs):
'''Get a BoundArguments object, that maps the passed `args`
and `kwargs` to the function's signature. Raises `TypeError`
if the passed arguments can not be bound.
'''
return args[0]._bind(args[1:], kwargs)
def bind_partial(self, *args, **kwargs):
'''Get a BoundArguments object, that partially maps the
passed `args` and `kwargs` to the function's signature.
Raises `TypeError` if the passed arguments can not be bound.
'''
return self._bind(args, kwargs, partial=True)
def __str__(self):
result = []
render_kw_only_separator = True
for idx, param in enumerate(self.parameters.values()):
formatted = str(param)
kind = param.kind
if kind == _VAR_POSITIONAL:
# OK, we have an '*args'-like parameter, so we won't need
# a '*' to separate keyword-only arguments
render_kw_only_separator = False
elif kind == _KEYWORD_ONLY and render_kw_only_separator:
# We have a keyword-only parameter to render and we haven't
# rendered an '*args'-like parameter before, so add a '*'
# separator to the parameters list ("foo(arg1, *, arg2)" case)
result.append('*')
# This condition should be only triggered once, so
# reset the flag
render_kw_only_separator = False
result.append(formatted)
rendered = '({0})'.format(', '.join(result))
if self.return_annotation is not _empty:
anno = formatannotation(self.return_annotation)
rendered += ' -> {0}'.format(anno)
return rendered

1
lib/funcsigs/version.py
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__version__ = "1.0.2"

297
lib/future_fstrings.py
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@ -1,297 +0,0 @@
from __future__ import absolute_import
from __future__ import unicode_literals
import argparse
import codecs
import encodings
import io
import sys
utf_8 = encodings.search_function('utf8')
class TokenSyntaxError(SyntaxError):
def __init__(self, e, token):
super(TokenSyntaxError, self).__init__(e)
self.e = e
self.token = token
def _find_literal(s, start, level, parts, exprs):
"""Roughly Python/ast.c:fstring_find_literal"""
i = start
parse_expr = True
while i < len(s):
ch = s[i]
if ch in ('{', '}'):
if level == 0:
if i + 1 < len(s) and s[i + 1] == ch:
i += 2
parse_expr = False
break
elif ch == '}':
raise SyntaxError("f-string: single '}' is not allowed")
break
i += 1
parts.append(s[start:i])
return i, parse_expr and i < len(s)
def _find_expr(s, start, level, parts, exprs):
"""Roughly Python/ast.c:fstring_find_expr"""
i = start
nested_depth = 0
quote_char = None
triple_quoted = None
def _check_end():
if i == len(s):
raise SyntaxError("f-string: expecting '}'")
if level >= 2:
raise SyntaxError("f-string: expressions nested too deeply")
parts.append(s[i])
i += 1
while i < len(s):
ch = s[i]
if ch == '\\':
raise SyntaxError(
'f-string expression part cannot include a backslash',
)
if quote_char is not None:
if ch == quote_char:
if triple_quoted:
if i + 2 < len(s) and s[i + 1] == ch and s[i + 2] == ch:
i += 2
quote_char = None
triple_quoted = None
else:
quote_char = None
triple_quoted = None
elif ch in ('"', "'"):
quote_char = ch
if i + 2 < len(s) and s[i + 1] == ch and s[i + 2] == ch:
triple_quoted = True
i += 2
else:
triple_quoted = False
elif ch in ('[', '{', '('):
nested_depth += 1
elif nested_depth and ch in (']', '}', ')'):
nested_depth -= 1
elif ch == '#':
raise SyntaxError("f-string expression cannot include '#'")
elif nested_depth == 0 and ch in ('!', ':', '}'):
if ch == '!' and i + 1 < len(s) and s[i + 1] == '=':
# Allow != at top level as `=` isn't a valid conversion
pass
else:
break
i += 1
if quote_char is not None:
raise SyntaxError('f-string: unterminated string')
elif nested_depth:
raise SyntaxError("f-string: mismatched '(', '{', or '['")
_check_end()
exprs.append(s[start + 1:i])
if s[i] == '!':
parts.append(s[i])
i += 1
_check_end()
parts.append(s[i])
i += 1
_check_end()
if s[i] == ':':
parts.append(s[i])
i += 1
_check_end()
i = _fstring_parse(s, i, level + 1, parts, exprs)
_check_end()
if s[i] != '}':
raise SyntaxError("f-string: expecting '}'")
parts.append(s[i])
i += 1
return i
def _fstring_parse(s, i, level, parts, exprs):
"""Roughly Python/ast.c:fstring_find_literal_and_expr"""
while True:
i, parse_expr = _find_literal(s, i, level, parts, exprs)
if i == len(s) or s[i] == '}':
return i
if parse_expr:
i = _find_expr(s, i, level, parts, exprs)
def _fstring_parse_outer(s, i, level, parts, exprs):
for q in ('"' * 3, "'" * 3, '"', "'"):
if s.startswith(q):
s = s[len(q):len(s) - len(q)]
break
else:
raise AssertionError('unreachable')
parts.append(q)
ret = _fstring_parse(s, i, level, parts, exprs)
parts.append(q)
return ret
def _is_f(token):
import tokenize_rt
prefix, _ = tokenize_rt.parse_string_literal(token.src)
return 'f' in prefix.lower()
def _make_fstring(tokens):
import tokenize_rt
new_tokens = []
exprs = []
for i, token in enumerate(tokens):
if token.name == 'STRING' and _is_f(token):
prefix, s = tokenize_rt.parse_string_literal(token.src)
parts = []
try:
_fstring_parse_outer(s, 0, 0, parts, exprs)
except SyntaxError as e:
raise TokenSyntaxError(e, tokens[i - 1])
if 'r' in prefix.lower():
parts = [s.replace('\\', '\\\\') for s in parts]
token = token._replace(src=''.join(parts))
elif token.name == 'STRING':
new_src = token.src.replace('{', '{{').replace('}', '}}')
token = token._replace(src=new_src)
new_tokens.append(token)
exprs = ('({})'.format(expr) for expr in exprs)
format_src = '.format({})'.format(', '.join(exprs))
new_tokens.append(tokenize_rt.Token('FORMAT', src=format_src))
return new_tokens
def decode(b, errors='strict'):
import tokenize_rt # pip install future-fstrings[rewrite]
u, length = utf_8.decode(b, errors)
tokens = tokenize_rt.src_to_tokens(u)
to_replace = []
start = end = seen_f = None
for i, token in enumerate(tokens):
if start is None:
if token.name == 'STRING':
start, end = i, i + 1
seen_f = _is_f(token)
elif token.name == 'STRING':
end = i + 1
seen_f |= _is_f(token)
elif token.name not in tokenize_rt.NON_CODING_TOKENS:
if seen_f:
to_replace.append((start, end))
start = end = seen_f = None
for start, end in reversed(to_replace):
try:
tokens[start:end] = _make_fstring(tokens[start:end])
except TokenSyntaxError as e:
msg = str(e.e)
line = u.splitlines()[e.token.line - 1]
bts = line.encode('UTF-8')[:e.token.utf8_byte_offset]
indent = len(bts.decode('UTF-8'))
raise SyntaxError(msg + '\n\n' + line + '\n' + ' ' * indent + '^')
return tokenize_rt.tokens_to_src(tokens), length
class IncrementalDecoder(codecs.BufferedIncrementalDecoder):
def _buffer_decode(self, input, errors, final): # pragma: no cover
if final:
return decode(input, errors)
else:
return '', 0
class StreamReader(utf_8.streamreader, object):
"""decode is deferred to support better error messages"""
_stream = None
_decoded = False
@property
def stream(self):
if not self._decoded:
text, _ = decode(self._stream.read())
self._stream = io.BytesIO(text.encode('UTF-8'))
self._decoded = True
return self._stream
@stream.setter
def stream(self, stream):
self._stream = stream
self._decoded = False
def _natively_supports_fstrings():
try:
return eval('f"hi"') == 'hi'
except SyntaxError:
return False
fstring_decode = decode
SUPPORTS_FSTRINGS = _natively_supports_fstrings()
if SUPPORTS_FSTRINGS: # pragma: no cover
decode = utf_8.decode # noqa
IncrementalDecoder = utf_8.incrementaldecoder # noqa
StreamReader = utf_8.streamreader # noqa
# codec api
codec_map = {
name: codecs.CodecInfo(
name=name,
encode=utf_8.encode,
decode=decode,
incrementalencoder=utf_8.incrementalencoder,
incrementaldecoder=IncrementalDecoder,
streamreader=StreamReader,
streamwriter=utf_8.streamwriter,
)
for name in ('future-fstrings', 'future_fstrings')
}
def register(): # pragma: no cover
codecs.register(codec_map.get)
def main(argv=None):
parser = argparse.ArgumentParser(description='Prints transformed source.')
parser.add_argument('filename')
args = parser.parse_args(argv)
with open(args.filename, 'rb') as f:
text, _ = fstring_decode(f.read())
getattr(sys.stdout, 'buffer', sys.stdout).write(text.encode('UTF-8'))
if __name__ == '__main__':
exit(main())

1928
lib/ipaddr.py
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lib/ipaddress.py
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195
lib/logutils/__init__.py
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@ -1,195 +0,0 @@
#
# Copyright (C) 2010-2013 Vinay Sajip. See LICENSE.txt for details.
#
"""
The logutils package provides a set of handlers for the Python standard
library's logging package.
Some of these handlers are out-of-scope for the standard library, and
so they are packaged here. Others are updated versions which have
appeared in recent Python releases, but are usable with older versions
of Python, and so are packaged here.
"""
import logging
from string import Template
__version__ = '0.3.3'
class NullHandler(logging.Handler):
"""
This handler does nothing. It's intended to be used to avoid the
"No handlers could be found for logger XXX" one-off warning. This is
important for library code, which may contain code to log events. If a user
of the library does not configure logging, the one-off warning might be
produced; to avoid this, the library developer simply needs to instantiate
a NullHandler and add it to the top-level logger of the library module or
package.
"""
def handle(self, record):
"""
Handle a record. Does nothing in this class, but in other
handlers it typically filters and then emits the record in a
thread-safe way.
"""
pass
def emit(self, record):
"""
Emit a record. This does nothing and shouldn't be called during normal
processing, unless you redefine :meth:`~logutils.NullHandler.handle`.
"""
pass
def createLock(self):
"""
Since this handler does nothing, it has no underlying I/O to protect
against multi-threaded access, so this method returns `None`.
"""
self.lock = None
class PercentStyle(object):
default_format = '%(message)s'
asctime_format = '%(asctime)s'
def __init__(self, fmt):
self._fmt = fmt or self.default_format
def usesTime(self):
return self._fmt.find(self.asctime_format) >= 0
def format(self, record):
return self._fmt % record.__dict__
class StrFormatStyle(PercentStyle):
default_format = '{message}'
asctime_format = '{asctime}'
def format(self, record):
return self._fmt.format(**record.__dict__)
class StringTemplateStyle(PercentStyle):
default_format = '${message}'
asctime_format = '${asctime}'
def __init__(self, fmt):
self._fmt = fmt or self.default_format
self._tpl = Template(self._fmt)
def usesTime(self):
fmt = self._fmt
return fmt.find('$asctime') >= 0 or fmt.find(self.asctime_format) >= 0
def format(self, record):
return self._tpl.substitute(**record.__dict__)
_STYLES = {
'%': PercentStyle,
'{': StrFormatStyle,
'$': StringTemplateStyle
}
class Formatter(logging.Formatter):
"""
Subclasses Formatter in Pythons earlier than 3.2 in order to give
3.2 Formatter behaviour with respect to allowing %-, {} or $-
formatting.
"""
def __init__(self, fmt=None, datefmt=None, style='%'):
"""
Initialize the formatter with specified format strings.
Initialize the formatter either with the specified format string, or a
default as described above. Allow for specialized date formatting with
the optional datefmt argument (if omitted, you get the ISO8601 format).
Use a style parameter of '%', '{' or '$' to specify that you want to
use one of %-formatting, :meth:`str.format` (``{}``) formatting or
:class:`string.Template` formatting in your format string.
"""
if style not in _STYLES:
raise ValueError('Style must be one of: %s' % ','.join(
_STYLES.keys()))
self._style = _STYLES[style](fmt)
self._fmt = self._style._fmt
self.datefmt = datefmt
def usesTime(self):
"""
Check if the format uses the creation time of the record.
"""
return self._style.usesTime()
def formatMessage(self, record):
return self._style.format(record)
def format(self, record):
"""
Format the specified record as text.
The record's attribute dictionary is used as the operand to a
string formatting operation which yields the returned string.
Before formatting the dictionary, a couple of preparatory steps
are carried out. The message attribute of the record is computed
using LogRecord.getMessage(). If the formatting string uses the
time (as determined by a call to usesTime(), formatTime() is
called to format the event time. If there is exception information,
it is formatted using formatException() and appended to the message.
"""
record.message = record.getMessage()
if self.usesTime():
record.asctime = self.formatTime(record, self.datefmt)
s = self.formatMessage(record)
if record.exc_info:
# Cache the traceback text to avoid converting it multiple times
# (it's constant anyway)
if not record.exc_text:
record.exc_text = self.formatException(record.exc_info)
if record.exc_text:
if s[-1:] != "\n":
s = s + "\n"
s = s + record.exc_text
return s
class BraceMessage(object):
def __init__(self, fmt, *args, **kwargs):
self.fmt = fmt
self.args = args
self.kwargs = kwargs
self.str = None
def __str__(self):
if self.str is None:
self.str = self.fmt.format(*self.args, **self.kwargs)
return self.str
class DollarMessage(object):
def __init__(self, fmt, **kwargs):
self.fmt = fmt
self.kwargs = kwargs
self.str = None
def __str__(self):
if self.str is None:
self.str = Template(self.fmt).substitute(**self.kwargs)
return self.str
def hasHandlers(logger):
"""
See if a logger has any handlers.
"""
rv = False
while logger:
if logger.handlers:
rv = True
break
elif not logger.propagate:
break
else:
logger = logger.parent
return rv

116
lib/logutils/adapter.py
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@ -1,116 +0,0 @@
#
# Copyright (C) 2010-2013 Vinay Sajip. See LICENSE.txt for details.
#
import logging
import logutils
class LoggerAdapter(object):
"""
An adapter for loggers which makes it easier to specify contextual
information in logging output.
"""
def __init__(self, logger, extra):
"""
Initialize the adapter with a logger and a dict-like object which
provides contextual information. This constructor signature allows
easy stacking of LoggerAdapters, if so desired.
You can effectively pass keyword arguments as shown in the
following example:
adapter = LoggerAdapter(someLogger, dict(p1=v1, p2="v2"))
"""
self.logger = logger
self.extra = extra
def process(self, msg, kwargs):
"""
Process the logging message and keyword arguments passed in to
a logging call to insert contextual information. You can either
manipulate the message itself, the keyword args or both. Return
the message and kwargs modified (or not) to suit your needs.
Normally, you'll only need to override this one method in a
LoggerAdapter subclass for your specific needs.
"""
kwargs["extra"] = self.extra
return msg, kwargs
#
# Boilerplate convenience methods
#
def debug(self, msg, *args, **kwargs):
"""
Delegate a debug call to the underlying logger.
"""
self.log(logging.DEBUG, msg, *args, **kwargs)
def info(self, msg, *args, **kwargs):
"""
Delegate an info call to the underlying logger.
"""
self.log(logging.INFO, msg, *args, **kwargs)
def warning(self, msg, *args, **kwargs):
"""
Delegate a warning call to the underlying logger.
"""
self.log(logging.WARNING, msg, *args, **kwargs)
warn = warning
def error(self, msg, *args, **kwargs):
"""
Delegate an error call to the underlying logger.
"""
self.log(logging.ERROR, msg, *args, **kwargs)
def exception(self, msg, *args, **kwargs):
"""
Delegate an exception call to the underlying logger.
"""
kwargs["exc_info"] = 1
self.log(logging.ERROR, msg, *args, **kwargs)
def critical(self, msg, *args, **kwargs):
"""
Delegate a critical call to the underlying logger.
"""
self.log(logging.CRITICAL, msg, *args, **kwargs)
def log(self, level, msg, *args, **kwargs):
"""
Delegate a log call to the underlying logger, after adding
contextual information from this adapter instance.
"""
if self.isEnabledFor(level):
msg, kwargs = self.process(msg, kwargs)
self.logger._log(level, msg, args, **kwargs)
def isEnabledFor(self, level):
"""
Is this logger enabled for level 'level'?
"""
if self.logger.manager.disable >= level:
return False
return level >= self.getEffectiveLevel()
def setLevel(self, level):
"""
Set the specified level on the underlying logger.
"""
self.logger.setLevel(level)
def getEffectiveLevel(self):
"""
Get the effective level for the underlying logger.
"""
return self.logger.getEffectiveLevel()
def hasHandlers(self):
"""
See if the underlying logger has any handlers.
"""
return logutils.hasHandlers(self.logger)

194
lib/logutils/colorize.py
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@ -1,194 +0,0 @@
#
# Copyright (C) 2010-2013 Vinay Sajip. All rights reserved.
#
import ctypes
import logging
import os
try:
unicode
except NameError:
unicode = None
class ColorizingStreamHandler(logging.StreamHandler):
"""
A stream handler which supports colorizing of console streams
under Windows, Linux and Mac OS X.
:param strm: The stream to colorize - typically ``sys.stdout``
or ``sys.stderr``.
"""
# color names to indices
color_map = {
'black': 0,
'red': 1,
'green': 2,
'yellow': 3,
'blue': 4,
'magenta': 5,
'cyan': 6,
'white': 7,
}
#levels to (background, foreground, bold/intense)
if os.name == 'nt':
level_map = {
logging.DEBUG: (None, 'blue', True),
logging.INFO: (None, 'white', False),
logging.WARNING: (None, 'yellow', True),
logging.ERROR: (None, 'red', True),
logging.CRITICAL: ('red', 'white', True),
}
else:
"Maps levels to colour/intensity settings."
level_map = {
logging.DEBUG: (None, 'blue', False),
logging.INFO: (None, 'black', False),
logging.WARNING: (None, 'yellow', False),
logging.ERROR: (None, 'red', False),
logging.CRITICAL: ('red', 'white', True),
}
csi = '\x1b['
reset = '\x1b[0m'
@property
def is_tty(self):
"Returns true if the handler's stream is a terminal."
isatty = getattr(self.stream, 'isatty', None)
return isatty and isatty()
def emit(self, record):
try:
message = self.format(record)
stream = self.stream
if unicode and isinstance(message, unicode):
enc = getattr(stream, 'encoding', 'utf-8')
message = message.encode(enc, 'replace')
if not self.is_tty:
stream.write(message)
else:
self.output_colorized(message)
stream.write(getattr(self, 'terminator', '\n'))
self.flush()
except (KeyboardInterrupt, SystemExit):
raise
except:
self.handleError(record)
if os.name != 'nt':
def output_colorized(self, message):
"""
Output a colorized message.
On Linux and Mac OS X, this method just writes the
already-colorized message to the stream, since on these
platforms console streams accept ANSI escape sequences
for colorization. On Windows, this handler implements a
subset of ANSI escape sequence handling by parsing the
message, extracting the sequences and making Win32 API
calls to colorize the output.
:param message: The message to colorize and output.
"""
self.stream.write(message)
else:
import re
ansi_esc = re.compile(r'\x1b\[((?:\d+)(?:;(?:\d+))*)m')
nt_color_map = {
0: 0x00, # black
1: 0x04, # red
2: 0x02, # green
3: 0x06, # yellow
4: 0x01, # blue
5: 0x05, # magenta
6: 0x03, # cyan
7: 0x07, # white
}
def output_colorized(self, message):
"""
Output a colorized message.
On Linux and Mac OS X, this method just writes the
already-colorized message to the stream, since on these
platforms console streams accept ANSI escape sequences
for colorization. On Windows, this handler implements a
subset of ANSI escape sequence handling by parsing the
message, extracting the sequences and making Win32 API
calls to colorize the output.
:param message: The message to colorize and output.
"""
parts = self.ansi_esc.split(message)
write = self.stream.write
h = None
fd = getattr(self.stream, 'fileno', None)
if fd is not None:
fd = fd()
if fd in (1, 2): # stdout or stderr
h = ctypes.windll.kernel32.GetStdHandle(-10 - fd)
while parts:
text = parts.pop(0)
if text:
write(text)
if parts:
params = parts.pop(0)
if h is not None:
params = [int(p) for p in params.split(';')]
color = 0
for p in params:
if 40 <= p <= 47:
color |= self.nt_color_map[p - 40] << 4
elif 30 <= p <= 37:
color |= self.nt_color_map[p - 30]
elif p == 1:
color |= 0x08 # foreground intensity on
elif p == 0: # reset to default color
color = 0x07
else:
pass # error condition ignored
ctypes.windll.kernel32.SetConsoleTextAttribute(h, color)
def colorize(self, message, record):
"""
Colorize a message for a logging event.
This implementation uses the ``level_map`` class attribute to
map the LogRecord's level to a colour/intensity setting, which is
then applied to the whole message.
:param message: The message to colorize.
:param record: The ``LogRecord`` for the message.
"""
if record.levelno in self.level_map:
bg, fg, bold = self.level_map[record.levelno]
params = []
if bg in self.color_map:
params.append(str(self.color_map[bg] + 40))
if fg in self.color_map:
params.append(str(self.color_map[fg] + 30))
if bold:
params.append('1')
if params:
message = ''.join((self.csi, ';'.join(params),
'm', message, self.reset))
return message
def format(self, record):
"""
Formats a record for output.
This implementation colorizes the message line, but leaves
any traceback unolorized.
"""
message = logging.StreamHandler.format(self, record)
if self.is_tty:
# Don't colorize any traceback
parts = message.split('\n', 1)
parts[0] = self.colorize(parts[0], record)
message = '\n'.join(parts)
return message

573
lib/logutils/dictconfig.py
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@ -1,573 +0,0 @@
#
# Copyright (C) 2009-2013 Vinay Sajip. See LICENSE.txt for details.
#
import logging.handlers
import re
import sys
import types
try:
basestring
except NameError:
basestring = str
try:
StandardError
except NameError:
StandardError = Exception
IDENTIFIER = re.compile('^[a-z_][a-z0-9_]*$', re.I)
def valid_ident(s):
m = IDENTIFIER.match(s)
if not m:
raise ValueError('Not a valid Python identifier: %r' % s)
return True
#
# This function is defined in logging only in recent versions of Python
#
try:
from logging import _checkLevel
except ImportError:
def _checkLevel(level):
if isinstance(level, int):
rv = level
elif str(level) == level:
if level not in logging._levelNames:
raise ValueError('Unknown level: %r' % level)
rv = logging._levelNames[level]
else:
raise TypeError('Level not an integer or a '
'valid string: %r' % level)
return rv
# The ConvertingXXX classes are wrappers around standard Python containers,
# and they serve to convert any suitable values in the container. The
# conversion converts base dicts, lists and tuples to their wrapped
# equivalents, whereas strings which match a conversion format are converted
# appropriately.
#
# Each wrapper should have a configurator attribute holding the actual
# configurator to use for conversion.
class ConvertingDict(dict):
"""A converting dictionary wrapper."""
def __getitem__(self, key):
value = dict.__getitem__(self, key)
result = self.configurator.convert(value)
#If the converted value is different, save for next time
if value is not result:
self[key] = result
if type(result) in (ConvertingDict, ConvertingList,
ConvertingTuple):
result.parent = self
result.key = key
return result
def get(self, key, default=None):
value = dict.get(self, key, default)
result = self.configurator.convert(value)
#If the converted value is different, save for next time
if value is not result:
self[key] = result
if type(result) in (ConvertingDict, ConvertingList,
ConvertingTuple):
result.parent = self
result.key = key
return result
def pop(self, key, default=None):
value = dict.pop(self, key, default)
result = self.configurator.convert(value)
if value is not result:
if type(result) in (ConvertingDict, ConvertingList,
ConvertingTuple):
result.parent = self
result.key = key
return result
class ConvertingList(list):
"""A converting list wrapper."""
def __getitem__(self, key):
value = list.__getitem__(self, key)
result = self.configurator.convert(value)
#If the converted value is different, save for next time
if value is not result:
self[key] = result
if type(result) in (ConvertingDict, ConvertingList,
ConvertingTuple):
result.parent = self
result.key = key
return result
def pop(self, idx=-1):
value = list.pop(self, idx)
result = self.configurator.convert(value)
if value is not result:
if type(result) in (ConvertingDict, ConvertingList,
ConvertingTuple):
result.parent = self
return result
class ConvertingTuple(tuple):
"""A converting tuple wrapper."""
def __getitem__(self, key):
value = tuple.__getitem__(self, key)
result = self.configurator.convert(value)
if value is not result:
if type(result) in (ConvertingDict, ConvertingList,
ConvertingTuple):
result.parent = self
result.key = key
return result
class BaseConfigurator(object):
"""
The configurator base class which defines some useful defaults.
"""
CONVERT_PATTERN = re.compile(r'^(?P<prefix>[a-z]+)://(?P<suffix>.*)$')
WORD_PATTERN = re.compile(r'^\s*(\w+)\s*')
DOT_PATTERN = re.compile(r'^\.\s*(\w+)\s*')
INDEX_PATTERN = re.compile(r'^\[\s*(\w+)\s*\]\s*')
DIGIT_PATTERN = re.compile(r'^\d+$')
value_converters = {
'ext' : 'ext_convert',
'cfg' : 'cfg_convert',
}
# We might want to use a different one, e.g. importlib
importer = __import__
"Allows the importer to be redefined."
def __init__(self, config):
"""
Initialise an instance with the specified configuration
dictionary.
"""
self.config = ConvertingDict(config)
self.config.configurator = self
def resolve(self, s):
"""
Resolve strings to objects using standard import and attribute
syntax.
"""
name = s.split('.')
used = name.pop(0)
try:
found = self.importer(used)
for frag in name:
used += '.' + frag
try:
found = getattr(found, frag)
except AttributeError:
self.importer(used)
found = getattr(found, frag)
return found
except ImportError:
e, tb = sys.exc_info()[1:]
v = ValueError('Cannot resolve %r: %s' % (s, e))
v.__cause__, v.__traceback__ = e, tb
raise v
def ext_convert(self, value):
"""Default converter for the ext:// protocol."""
return self.resolve(value)
def cfg_convert(self, value):
"""Default converter for the cfg:// protocol."""
rest = value
m = self.WORD_PATTERN.match(rest)
if m is None:
raise ValueError("Unable to convert %r" % value)
else:
rest = rest[m.end():]
d = self.config[m.groups()[0]]
#print d, rest
while rest:
m = self.DOT_PATTERN.match(rest)
if m:
d = d[m.groups()[0]]
else:
m = self.INDEX_PATTERN.match(rest)
if m:
idx = m.groups()[0]
if not self.DIGIT_PATTERN.match(idx):
d = d[idx]
else:
try:
n = int(idx) # try as number first (most likely)
d = d[n]
except TypeError:
d = d[idx]
if m:
rest = rest[m.end():]
else:
raise ValueError('Unable to convert '
'%r at %r' % (value, rest))
#rest should be empty
return d
def convert(self, value):
"""
Convert values to an appropriate type. dicts, lists and tuples are
replaced by their converting alternatives. Strings are checked to
see if they have a conversion format and are converted if they do.
"""
if not isinstance(value, ConvertingDict) and isinstance(value, dict):
value = ConvertingDict(value)
value.configurator = self
elif not isinstance(value, ConvertingList) and isinstance(value, list):
value = ConvertingList(value)
value.configurator = self
elif not isinstance(value, ConvertingTuple) and\
isinstance(value, tuple):
value = ConvertingTuple(value)
value.configurator = self
elif isinstance(value, basestring):
m = self.CONVERT_PATTERN.match(value)
if m:
d = m.groupdict()
prefix = d['prefix']
converter = self.value_converters.get(prefix, None)
if converter:
suffix = d['suffix']
converter = getattr(self, converter)
value = converter(suffix)
return value
def configure_custom(self, config):
"""Configure an object with a user-supplied factory."""
c = config.pop('()')
if isinstance(c, basestring):
c = self.resolve(c)
props = config.pop('.', None)
# Check for valid identifiers
kwargs = dict([(k, config[k]) for k in config if valid_ident(k)])
result = c(**kwargs)
if props:
for name, value in props.items():
setattr(result, name, value)
return result
def as_tuple(self, value):
"""Utility function which converts lists to tuples."""
if isinstance(value, list):
value = tuple(value)
return value
def named_handlers_supported():
major, minor = sys.version_info[:2]
if major == 2:
result = minor >= 7
elif major == 3:
result = minor >= 2
else:
result = (major > 3)
return result
class DictConfigurator(BaseConfigurator):
"""
Configure logging using a dictionary-like object to describe the
configuration.
"""
def configure(self):
"""Do the configuration."""
config = self.config
if 'version' not in config:
raise ValueError("dictionary doesn't specify a version")
if config['version'] != 1:
raise ValueError("Unsupported version: %s" % config['version'])
incremental = config.pop('incremental', False)
EMPTY_DICT = {}
logging._acquireLock()
try:
if incremental:
handlers = config.get('handlers', EMPTY_DICT)
# incremental handler config only if handler name
# ties in to logging._handlers (Python 2.7, 3.2+)
if named_handlers_supported():
for name in handlers:
if name not in logging._handlers:
raise ValueError('No handler found with '
'name %r' % name)
else:
try:
handler = logging._handlers[name]
handler_config = handlers[name]
level = handler_config.get('level', None)
if level:
handler.setLevel(_checkLevel(level))
except StandardError:
e = sys.exc_info()[1]
raise ValueError('Unable to configure handler '
'%r: %s' % (name, e))
loggers = config.get('loggers', EMPTY_DICT)
for name in loggers:
try:
self.configure_logger(name, loggers[name], True)
except StandardError:
e = sys.exc_info()[1]
raise ValueError('Unable to configure logger '
'%r: %s' % (name, e))
root = config.get('root', None)
if root:
try:
self.configure_root(root, True)
except StandardError:
e = sys.exc_info()[1]
raise ValueError('Unable to configure root '
'logger: %s' % e)
else:
disable_existing = config.pop('disable_existing_loggers', True)
logging._handlers.clear()
del logging._handlerList[:]
# Do formatters first - they don't refer to anything else
formatters = config.get('formatters', EMPTY_DICT)
for name in formatters:
try:
formatters[name] = self.configure_formatter(
formatters[name])
except StandardError:
e = sys.exc_info()[1]
raise ValueError('Unable to configure '
'formatter %r: %s' % (name, e))
# Next, do filters - they don't refer to anything else, either
filters = config.get('filters', EMPTY_DICT)
for name in filters:
try:
filters[name] = self.configure_filter(filters[name])
except StandardError:
e = sys.exc_info()[1]
raise ValueError('Unable to configure '
'filter %r: %s' % (name, e))
# Next, do handlers - they refer to formatters and filters
# As handlers can refer to other handlers, sort the keys
# to allow a deterministic order of configuration
handlers = config.get('handlers', EMPTY_DICT)
for name in sorted(handlers):
try:
handler = self.configure_handler(handlers[name])
handler.name = name
handlers[name] = handler
except StandardError:
e = sys.exc_info()[1]
raise ValueError('Unable to configure handler '
'%r: %s' % (name, e))
# Next, do loggers - they refer to handlers and filters
#we don't want to lose the existing loggers,
#since other threads may have pointers to them.
#existing is set to contain all existing loggers,
#and as we go through the new configuration we
#remove any which are configured. At the end,
#what's left in existing is the set of loggers
#which were in the previous configuration but
#which are not in the new configuration.
root = logging.root
existing = sorted(root.manager.loggerDict.keys())
#The list needs to be sorted so that we can
#avoid disabling child loggers of explicitly
#named loggers. With a sorted list it is easier
#to find the child loggers.
#We'll keep the list of existing loggers
#which are children of named loggers here...
child_loggers = []
#now set up the new ones...
loggers = config.get('loggers', EMPTY_DICT)
for name in loggers:
if name in existing:
i = existing.index(name)
prefixed = name + "."
pflen = len(prefixed)
num_existing = len(existing)
i = i + 1 # look at the entry after name
while (i < num_existing) and\
(existing[i][:pflen] == prefixed):
child_loggers.append(existing[i])
i = i + 1
existing.remove(name)
try:
self.configure_logger(name, loggers[name])
except StandardError:
e = sys.exc_info()[1]
raise ValueError('Unable to configure logger '
'%r: %s' % (name, e))
#Disable any old loggers. There's no point deleting
#them as other threads may continue to hold references
#and by disabling them, you stop them doing any logging.
#However, don't disable children of named loggers, as that's
#probably not what was intended by the user.
for log in existing:
logger = root.manager.loggerDict[log]
if log in child_loggers:
logger.level = logging.NOTSET
logger.handlers = []
logger.propagate = True
elif disable_existing:
logger.disabled = True
# And finally, do the root logger
root = config.get('root', None)
if root:
try:
self.configure_root(root)
except StandardError:
e = sys.exc_info()[1]
raise ValueError('Unable to configure root '
'logger: %s' % e)
finally:
logging._releaseLock()
def configure_formatter(self, config):
"""Configure a formatter from a dictionary."""
if '()' in config:
factory = config['()'] # for use in exception handler
try:
result = self.configure_custom(config)
except TypeError:
te = sys.exc_info()[1]
if "'format'" not in str(te):
raise
#Name of parameter changed from fmt to format.
#Retry with old name.
#This is so that code can be used with older Python versions
#(e.g. by Django)
config['fmt'] = config.pop('format')
config['()'] = factory
result = self.configure_custom(config)
else:
fmt = config.get('format', None)
dfmt = config.get('datefmt', None)
result = logging.Formatter(fmt, dfmt)
return result
def configure_filter(self, config):
"""Configure a filter from a dictionary."""
if '()' in config:
result = self.configure_custom(config)
else:
name = config.get('name', '')
result = logging.Filter(name)
return result
def add_filters(self, filterer, filters):
"""Add filters to a filterer from a list of names."""
for f in filters:
try:
filterer.addFilter(self.config['filters'][f])
except StandardError:
e = sys.exc_info()[1]
raise ValueError('Unable to add filter %r: %s' % (f, e))
def configure_handler(self, config):
"""Configure a handler from a dictionary."""
formatter = config.pop('formatter', None)
if formatter:
try:
formatter = self.config['formatters'][formatter]
except StandardError:
e = sys.exc_info()[1]
raise ValueError('Unable to set formatter '
'%r: %s' % (formatter, e))
level = config.pop('level', None)
filters = config.pop('filters', None)
if '()' in config:
c = config.pop('()')
if isinstance(c, basestring):
c = self.resolve(c)
factory = c
else:
klass = self.resolve(config.pop('class'))
#Special case for handler which refers to another handler
if issubclass(klass, logging.handlers.MemoryHandler) and\
'target' in config:
try:
config['target'] = self.config['handlers'][config['target']]
except StandardError:
e = sys.exc_info()[1]
raise ValueError('Unable to set target handler '
'%r: %s' % (config['target'], e))
elif issubclass(klass, logging.handlers.SMTPHandler) and\
'mailhost' in config:
config['mailhost'] = self.as_tuple(config['mailhost'])
elif issubclass(klass, logging.handlers.SysLogHandler) and\
'address' in config:
config['address'] = self.as_tuple(config['address'])
factory = klass
kwargs = dict([(k, config[k]) for k in config if valid_ident(k)])
try:
result = factory(**kwargs)
except TypeError:
te = sys.exc_info()[1]
if "'stream'" not in str(te):
raise
#The argument name changed from strm to stream
#Retry with old name.
#This is so that code can be used with older Python versions
#(e.g. by Django)
kwargs['strm'] = kwargs.pop('stream')
result = factory(**kwargs)
if formatter:
result.setFormatter(formatter)
if level is not None:
result.setLevel(_checkLevel(level))
if filters:
self.add_filters(result, filters)
return result
def add_handlers(self, logger, handlers):
"""Add handlers to a logger from a list of names."""
for h in handlers:
try:
logger.addHandler(self.config['handlers'][h])
except StandardError:
e = sys.exc_info()[1]
raise ValueError('Unable to add handler %r: %s' % (h, e))
def common_logger_config(self, logger, config, incremental=False):
"""
Perform configuration which is common to root and non-root loggers.
"""
level = config.get('level', None)
if level is not None:
logger.setLevel(_checkLevel(level))
if not incremental:
#Remove any existing handlers
for h in logger.handlers[:]:
logger.removeHandler(h)
handlers = config.get('handlers', None)
if handlers:
self.add_handlers(logger, handlers)
filters = config.get('filters', None)
if filters:
self.add_filters(logger, filters)
def configure_logger(self, name, config, incremental=False):
"""Configure a non-root logger from a dictionary."""
logger = logging.getLogger(name)
self.common_logger_config(logger, config, incremental)
propagate = config.get('propagate', None)
if propagate is not None:
logger.propagate = propagate
def configure_root(self, config, incremental=False):
"""Configure a root logger from a dictionary."""
root = logging.getLogger()
self.common_logger_config(root, config, incremental)
dictConfigClass = DictConfigurator
def dictConfig(config):
"""Configure logging using a dictionary."""
dictConfigClass(config).configure()

90
lib/logutils/http.py
View file

@ -1,90 +0,0 @@
#
# Copyright (C) 2010-2013 Vinay Sajip. See LICENSE.txt for details.
#
import logging
class HTTPHandler(logging.Handler):
"""
A class which sends records to a Web server, using either GET or
POST semantics.
:param host: The Web server to connect to.
:param url: The URL to use for the connection.
:param method: The HTTP method to use. GET and POST are supported.
:param secure: set to True if HTTPS is to be used.
:param credentials: Set to a username/password tuple if desired. If
set, a Basic authentication header is sent. WARNING:
if using credentials, make sure `secure` is `True`
to avoid sending usernames and passwords in
cleartext over the wire.
"""
def __init__(self, host, url, method="GET", secure=False, credentials=None):
"""
Initialize an instance.
"""
logging.Handler.__init__(self)
method = method.upper()
if method not in ["GET", "POST"]:
raise ValueError("method must be GET or POST")
self.host = host
self.url = url
self.method = method
self.secure = secure
self.credentials = credentials
def mapLogRecord(self, record):
"""
Default implementation of mapping the log record into a dict
that is sent as the CGI data. Overwrite in your class.
Contributed by Franz Glasner.
:param record: The record to be mapped.
"""
return record.__dict__
def emit(self, record):
"""
Emit a record.
Send the record to the Web server as a percent-encoded dictionary
:param record: The record to be emitted.
"""
try:
import http.client, urllib.parse
host = self.host
if self.secure:
h = http.client.HTTPSConnection(host)
else:
h = http.client.HTTPConnection(host)
url = self.url
data = urllib.parse.urlencode(self.mapLogRecord(record))
if self.method == "GET":
if (url.find('?') >= 0):
sep = '&'
else:
sep = '?'
url = url + "%c%s" % (sep, data)
h.putrequest(self.method, url)
# support multiple hosts on one IP address...
# need to strip optional :port from host, if present
i = host.find(":")
if i >= 0:
host = host[:i]
h.putheader("Host", host)
if self.method == "POST":
h.putheader("Content-type",
"application/x-www-form-urlencoded")
h.putheader("Content-length", str(len(data)))
if self.credentials:
import base64
s = ('u%s:%s' % self.credentials).encode('utf-8')
s = 'Basic ' + base64.b64encode(s).strip()
h.putheader('Authorization', s)
h.endheaders(data if self.method == "POST" else None)
h.getresponse() #can't do anything with the result
except (KeyboardInterrupt, SystemExit):
raise
except:
self.handleError(record)

225
lib/logutils/queue.py
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@ -1,225 +0,0 @@
#
# Copyright (C) 2010-2013 Vinay Sajip. See LICENSE.txt for details.
#
"""
This module contains classes which help you work with queues. A typical
application is when you want to log from performance-critical threads, but
where the handlers you want to use are slow (for example,
:class:`~logging.handlers.SMTPHandler`). In that case, you can create a queue,
pass it to a :class:`QueueHandler` instance and use that instance with your
loggers. Elsewhere, you can instantiate a :class:`QueueListener` with the same
queue and some slow handlers, and call :meth:`~QueueListener.start` on it.
This will start monitoring the queue on a separate thread and call all the
configured handlers *on that thread*, so that your logging thread is not held
up by the slow handlers.
Note that as well as in-process queues, you can use these classes with queues
from the :mod:`multiprocessing` module.
**N.B.** This is part of the standard library since Python 3.2, so the
version here is for use with earlier Python versions.
"""
import logging
try:
import Queue as queue
except ImportError:
import queue
import threading
class QueueHandler(logging.Handler):
"""
This handler sends events to a queue. Typically, it would be used together
with a multiprocessing Queue to centralise logging to file in one process
(in a multi-process application), so as to avoid file write contention
between processes.
:param queue: The queue to send `LogRecords` to.
"""
def __init__(self, queue):
"""
Initialise an instance, using the passed queue.
"""
logging.Handler.__init__(self)
self.queue = queue
def enqueue(self, record):
"""
Enqueue a record.
The base implementation uses :meth:`~queue.Queue.put_nowait`. You may
want to override this method if you want to use blocking, timeouts or
custom queue implementations.
:param record: The record to enqueue.
"""
self.queue.put_nowait(record)
def prepare(self, record):
"""
Prepares a record for queuing. The object returned by this method is
enqueued.
The base implementation formats the record to merge the message
and arguments, and removes unpickleable items from the record
in-place.
You might want to override this method if you want to convert
the record to a dict or JSON string, or send a modified copy
of the record while leaving the original intact.
:param record: The record to prepare.
"""
# The format operation gets traceback text into record.exc_text
# (if there's exception data), and also puts the message into
# record.message. We can then use this to replace the original
# msg + args, as these might be unpickleable. We also zap the
# exc_info attribute, as it's no longer needed and, if not None,
# will typically not be pickleable.
self.format(record)
record.msg = record.message
record.args = None
record.exc_info = None
return record
def emit(self, record):
"""
Emit a record.
Writes the LogRecord to the queue, preparing it for pickling first.
:param record: The record to emit.
"""
try:
self.enqueue(self.prepare(record))
except (KeyboardInterrupt, SystemExit):
raise
except:
self.handleError(record)
class QueueListener(object):
"""
This class implements an internal threaded listener which watches for
LogRecords being added to a queue, removes them and passes them to a
list of handlers for processing.
:param record: The queue to listen to.
:param handlers: The handlers to invoke on everything received from
the queue.
"""
_sentinel = None
def __init__(self, queue, *handlers):
"""
Initialise an instance with the specified queue and
handlers.
"""
self.queue = queue
self.handlers = handlers
self._stop = threading.Event()
self._thread = None
def dequeue(self, block):
"""
Dequeue a record and return it, optionally blocking.
The base implementation uses :meth:`~queue.Queue.get`. You may want to
override this method if you want to use timeouts or work with custom
queue implementations.
:param block: Whether to block if the queue is empty. If `False` and
the queue is empty, an :class:`~queue.Empty` exception
will be thrown.
"""
return self.queue.get(block)
def start(self):
"""
Start the listener.
This starts up a background thread to monitor the queue for
LogRecords to process.
"""
self._thread = t = threading.Thread(target=self._monitor)
t.setDaemon(True)
t.start()
def prepare(self , record):
"""
Prepare a record for handling.
This method just returns the passed-in record. You may want to
override this method if you need to do any custom marshalling or
manipulation of the record before passing it to the handlers.
:param record: The record to prepare.
"""
return record
def handle(self, record):
"""
Handle a record.
This just loops through the handlers offering them the record
to handle.
:param record: The record to handle.
"""
record = self.prepare(record)
for handler in self.handlers:
handler.handle(record)
def _monitor(self):
"""
Monitor the queue for records, and ask the handler
to deal with them.
This method runs on a separate, internal thread.
The thread will terminate if it sees a sentinel object in the queue.
"""
q = self.queue
has_task_done = hasattr(q, 'task_done')
while not self._stop.isSet():
try:
record = self.dequeue(True)
if record is self._sentinel:
break
self.handle(record)
if has_task_done:
q.task_done()
except queue.Empty:
pass
# There might still be records in the queue.
while True:
try:
record = self.dequeue(False)
if record is self._sentinel:
break
self.handle(record)
if has_task_done:
q.task_done()
except queue.Empty:
break
def enqueue_sentinel(self):
"""
Writes a sentinel to the queue to tell the listener to quit. This
implementation uses ``put_nowait()``. You may want to override this
method if you want to use timeouts or work with custom queue
implementations.
"""
self.queue.put_nowait(self._sentinel)
def stop(self):
"""
Stop the listener.
This asks the thread to terminate, and then waits for it to do so.
Note that if you don't call this before your application exits, there
may be some records still left on the queue, which won't be processed.
"""
self._stop.set()
self.enqueue_sentinel()
self._thread.join()
self._thread = None

75
lib/logutils/redis.py
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@ -1,75 +0,0 @@
#
# Copyright (C) 2011-2013 Vinay Sajip. See LICENSE.txt for details.
#
"""
This module contains classes which help you work with Redis queues.
"""
from logutils.queue import QueueHandler, QueueListener
try:
import cPickle as pickle
except ImportError:
import pickle
class RedisQueueHandler(QueueHandler):
"""
A QueueHandler implementation which pushes pickled
records to a Redis queue using a specified key.
:param key: The key to use for the queue. Defaults to
"python.logging".
:param redis: If specified, this instance is used to
communicate with a Redis instance.
:param limit: If specified, the queue is restricted to
have only this many elements.
"""
def __init__(self, key='python.logging', redis=None, limit=0):
if redis is None:
from redis import Redis
redis = Redis()
self.key = key
assert limit >= 0
self.limit = limit
QueueHandler.__init__(self, redis)
def enqueue(self, record):
s = pickle.dumps(vars(record))
self.queue.rpush(self.key, s)
if self.limit:
self.queue.ltrim(self.key, -self.limit, -1)
class RedisQueueListener(QueueListener):
"""
A QueueListener implementation which fetches pickled
records from a Redis queue using a specified key.
:param key: The key to use for the queue. Defaults to
"python.logging".
:param redis: If specified, this instance is used to
communicate with a Redis instance.
"""
def __init__(self, *handlers, **kwargs):
redis = kwargs.get('redis')
if redis is None:
from redis import Redis
redis = Redis()
self.key = kwargs.get('key', 'python.logging')
QueueListener.__init__(self, redis, *handlers)
def dequeue(self, block):
"""
Dequeue and return a record.
"""
if block:
s = self.queue.blpop(self.key)[1]
else:
s = self.queue.lpop(self.key)
if not s:
record = None
else:
record = pickle.loads(s)
return record
def enqueue_sentinel(self):
self.queue.rpush(self.key, '')

156
lib/logutils/testing.py
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@ -1,156 +0,0 @@
#
# Copyright (C) 2010-2013 Vinay Sajip. See LICENSE.txt for details.
#
import logging
from logging.handlers import BufferingHandler
class TestHandler(BufferingHandler):
"""
This handler collects records in a buffer for later inspection by
your unit test code.
:param matcher: The :class:`~logutils.testing.Matcher` instance to
use for matching.
"""
def __init__(self, matcher):
# BufferingHandler takes a "capacity" argument
# so as to know when to flush. As we're overriding
# shouldFlush anyway, we can set a capacity of zero.
# You can call flush() manually to clear out the
# buffer.
BufferingHandler.__init__(self, 0)
self.formatted = []
self.matcher = matcher
def shouldFlush(self):
"""
Should the buffer be flushed?
This returns `False` - you'll need to flush manually, usually after
your unit test code checks the buffer contents against your
expectations.
"""
return False
def emit(self, record):
"""
Saves the `__dict__` of the record in the `buffer` attribute,
and the formatted records in the `formatted` attribute.
:param record: The record to emit.
"""
self.formatted.append(self.format(record))
self.buffer.append(record.__dict__)
def flush(self):
"""
Clears out the `buffer` and `formatted` attributes.
"""
BufferingHandler.flush(self)
self.formatted = []
def matches(self, **kwargs):
"""
Look for a saved dict whose keys/values match the supplied arguments.
Return `True` if found, else `False`.
:param kwargs: A set of keyword arguments whose names are LogRecord
attributes and whose values are what you want to
match in a stored LogRecord.
"""
result = False
for d in self.buffer:
if self.matcher.matches(d, **kwargs):
result = True
break
#if not result:
# print('*** matcher failed completely on %d records' % len(self.buffer))
return result
def matchall(self, kwarglist):
"""
Accept a list of keyword argument values and ensure that the handler's
buffer of stored records matches the list one-for-one.
Return `True` if exactly matched, else `False`.
:param kwarglist: A list of keyword-argument dictionaries, each of
which will be passed to :meth:`matches` with the
corresponding record from the buffer.
"""
if self.count != len(kwarglist):
result = False
else:
result = True
for d, kwargs in zip(self.buffer, kwarglist):
if not self.matcher.matches(d, **kwargs):
result = False
break
return result
@property
def count(self):
"""
The number of records in the buffer.
"""
return len(self.buffer)
class Matcher(object):
"""
This utility class matches a stored dictionary of
:class:`logging.LogRecord` attributes with keyword arguments
passed to its :meth:`~logutils.testing.Matcher.matches` method.
"""
_partial_matches = ('msg', 'message')
"""
A list of :class:`logging.LogRecord` attribute names which
will be checked for partial matches. If not in this list,
an exact match will be attempted.
"""
def matches(self, d, **kwargs):
"""
Try to match a single dict with the supplied arguments.
Keys whose values are strings and which are in self._partial_matches
will be checked for partial (i.e. substring) matches. You can extend
this scheme to (for example) do regular expression matching, etc.
Return `True` if found, else `False`.
:param kwargs: A set of keyword arguments whose names are LogRecord
attributes and whose values are what you want to
match in a stored LogRecord.
"""
result = True
for k in kwargs:
v = kwargs[k]
dv = d.get(k)
if not self.match_value(k, dv, v):
#print('*** matcher failed: %s, %r, %r' % (k, dv, v))
result = False
break
return result
def match_value(self, k, dv, v):
"""
Try to match a single stored value (dv) with a supplied value (v).
Return `True` if found, else `False`.
:param k: The key value (LogRecord attribute name).
:param dv: The stored value to match against.
:param v: The value to compare with the stored value.
"""
if type(v) != type(dv):
result = False
elif type(dv) is not str or k not in self._partial_matches:
result = (v == dv)
else:
result = dv.find(v) >= 0
#if not result:
# print('*** matcher failed on %s: %r vs. %r' % (k, dv, v))
return result