# -*- coding: utf-8 -*- # # Copyright (C) 2012 The Python Software Foundation. # See LICENSE.txt and CONTRIBUTORS.txt. # """Backports for individual classes and functions.""" import os import sys __all__ = ['cache_from_source', 'callable', 'fsencode'] try: from imp import cache_from_source except ImportError: def cache_from_source(py_file, debug=__debug__): ext = debug and 'c' or 'o' return py_file + ext try: callable = callable except NameError: from collections import Callable def callable(obj): return isinstance(obj, Callable) try: fsencode = os.fsencode except AttributeError: def fsencode(filename): if isinstance(filename, bytes): return filename elif isinstance(filename, str): return filename.encode(sys.getfilesystemencoding()) else: raise TypeError("expect bytes or str, not %s" % type(filename).__name__)