61     import posixpath as path  namespace
81     import ntpath as path  namespace
674     def __getitem__(self, key):  argument
682     def __setitem__(self, key, value):  argument
688     def __delitem__(self, key):  argument
716     def setdefault(self, key, value):  argument
748         def encodekey(key):  argument
773 def getenv(key, default=None):  argument
794     def getenvb(key, default=None):  argument
1036 def _fspath(path):  argument
1092         def __init__(self, path, cookie, remove_dll_directory):  argument
1108     def add_dll_directory(path):  argument