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