+ if platform.python_implementation() == 'IronPython' and sys.version_info < (2, 7, 8):
+ class compat_Struct(struct.Struct):
+ def unpack(self, string):
+ if not isinstance(string, buffer): # noqa: F821
+ string = buffer(string) # noqa: F821
+ return super(compat_Struct, self).unpack(string)
+ else:
+ compat_Struct = struct.Struct
+
+
+try:
+ from future_builtins import zip as compat_zip
+except ImportError: # not 2.6+ or is 3.x
+ try:
+ from itertools import izip as compat_zip # < 2.5 or 3.x
+ except ImportError:
+ compat_zip = zip
+
+
+if sys.version_info < (3, 3):
+ def compat_b64decode(s, *args, **kwargs):
+ if isinstance(s, compat_str):
+ s = s.encode('ascii')
+ return base64.b64decode(s, *args, **kwargs)
+else:
+ compat_b64decode = base64.b64decode
+
+
+if platform.python_implementation() == 'PyPy' and sys.pypy_version_info < (5, 4, 0):
+ # PyPy2 prior to version 5.4.0 expects byte strings as Windows function
+ # names, see the original PyPy issue [1] and the youtube-dl one [2].
+ # 1. https://bitbucket.org/pypy/pypy/issues/2360/windows-ctypescdll-typeerror-function-name
+ # 2. https://github.com/ytdl-org/youtube-dl/pull/4392
+ def compat_ctypes_WINFUNCTYPE(*args, **kwargs):
+ real = ctypes.WINFUNCTYPE(*args, **kwargs)
+
+ def resf(tpl, *args, **kwargs):
+ funcname, dll = tpl
+ return real((str(funcname), dll), *args, **kwargs)
+
+ return resf
+else:
+ def compat_ctypes_WINFUNCTYPE(*args, **kwargs):
+ return ctypes.WINFUNCTYPE(*args, **kwargs)