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annotate cutils/util/cm.py @ 122:1e5127028254

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Move the real computation of digests from files and streams into dedicated submodule cutils.util.digest
author Franz Glasner <fzglas.hg@dom66.de>
date Wed, 01 Jan 2025 18:57:25 +0100
parents e15b3d1ff0d9
children dfe7bb0579e2
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1 # -*- coding: utf-8 -*-
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2 # :-
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3 # :Copyright: (c) 2020-2024 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 __all__ = ["nullcontext"]
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13 try:
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14 from contextlib import nullcontext
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15 except ImportError:
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16 class nullcontext(object):
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17
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18 """Compatibility implementation for systems that are missing yet
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19 a standard :class:`contextlib.nullcontext`.
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21 """
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23 __slots__ = ("thing", )
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25 def __init__(self, thing=None):
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26 self.thing = thing
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28 def __enter__(self):
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29 return self.thing
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31 def __exit__(self, *args, **kwds):
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32 pass