Update soupsieve-2.2.1

lib/soupsieve/util.py

@@ -1,46 +1,17 @@
 """Utility."""
-from __future__ import unicode_literals
-from functools import wraps
+from functools import wraps, lru_cache
 import warnings
-import sys
-import struct
-import os
 import re
-MODULE = os.path.dirname(__file__)
-
-PY3 = sys.version_info >= (3, 0)
-PY35 = sys.version_info >= (3, 5)
-PY37 = sys.version_info >= (3, 7)
-
-if PY3:
-    from functools import lru_cache  # noqa F401
-    import copyreg  # noqa F401
-    from collections.abc import Hashable, Mapping  # noqa F401
-
-    ustr = str
-    bstr = bytes
-    unichar = chr
-    string = str
-else:
-    from backports.functools_lru_cache import lru_cache  # noqa F401
-    import copy_reg as copyreg  # noqa F401
-    from collections import Hashable, Mapping  # noqa F401
-
-    ustr = unicode  # noqa: F821
-    bstr = str
-    unichar = unichr  # noqa: F821
-    string = basestring  # noqa: F821
 
 DEBUG = 0x00001
 
 RE_PATTERN_LINE_SPLIT = re.compile(r'(?:\r\n|(?!\r\n)[\n\r])|$')
 
-LC_A = ord('a')
-LC_Z = ord('z')
 UC_A = ord('A')
 UC_Z = ord('Z')
 
 
+@lru_cache(maxsize=512)
 def lower(string):
     """Lower."""
 
@@ -51,38 +22,7 @@ def lower(string):
     return ''.join(new_string)
 
 
-def upper(string):  # pragma: no cover
-    """Lower."""
-
-    new_string = []
-    for c in string:
-        o = ord(c)
-        new_string.append(chr(o - 32) if LC_A <= o <= LC_Z else c)
-    return ''.join(new_string)
-
-
-def uchr(i):
-    """Allow getting Unicode character on narrow python builds."""
-
-    try:
-        return unichar(i)
-    except ValueError:  # pragma: no cover
-        return struct.pack('i', i).decode('utf-32')
-
-
-def uord(c):
-    """Get Unicode ordinal."""
-
-    if len(c) == 2:  # pragma: no cover
-        high, low = [ord(p) for p in c]
-        ordinal = (high - 0xD800) * 0x400 + low - 0xDC00 + 0x10000
-    else:
-        ordinal = ord(c)
-
-    return ordinal
-
-
-class SelectorSyntaxError(SyntaxError):
+class SelectorSyntaxError(Exception):
     """Syntax error in a CSS selector."""
 
     def __init__(self, msg, pattern=None, index=None):