| # -*- 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__) |
