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annotate cutils/util/cm.py @ 273:c02a57df2a29

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treesum: - WalkDirEntry tests with a FIFO special file - WalkDirEntry.is_reg Also all to be handled special files in the notes document.
author Franz Glasner <fzglas.hg@dom66.de>
date Wed, 19 Feb 2025 09:12:30 +0100
parents 0f4febf646f5
children 48430941c18c
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1 # -*- coding: utf-8 -*-
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2 # :-
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3 # :Copyright: (c) 2020-2025 Franz Glasner
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4 # :License: BSD-3-Clause
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5 # :-
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6 r"""Context manager extensions and compatibility.
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7
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8 """
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9
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10 from __future__ import print_function, absolute_import
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13 __all__ = ["nullcontext"]
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16 try:
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17 from contextlib import nullcontext
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18 except ImportError:
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19 class nullcontext(object):
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21 """Compatibility implementation for systems that are missing yet
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22 a standard :class:`contextlib.nullcontext`.
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24 """
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26 __slots__ = ("thing", )
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28 def __init__(self, thing=None):
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29 self.thing = thing
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31 def __enter__(self):
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32 return self.thing
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34 def __exit__(self, *args, **kwds):
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35 pass