41 lines
1.3 KiB
Python
41 lines
1.3 KiB
Python
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import sys
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from contextlib import AbstractContextManager
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if sys.version_info < (3, 11):
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from ._exceptions import BaseExceptionGroup
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class suppress(AbstractContextManager):
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"""Backport of :class:`contextlib.suppress` from Python 3.12.1."""
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def __init__(self, *exceptions):
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self._exceptions = exceptions
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def __enter__(self):
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pass
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def __exit__(self, exctype, excinst, exctb):
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# Unlike isinstance and issubclass, CPython exception handling
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# currently only looks at the concrete type hierarchy (ignoring
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# the instance and subclass checking hooks). While Guido considers
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# that a bug rather than a feature, it's a fairly hard one to fix
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# due to various internal implementation details. suppress provides
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# the simpler issubclass based semantics, rather than trying to
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# exactly reproduce the limitations of the CPython interpreter.
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#
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# See http://bugs.python.org/issue12029 for more details
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if exctype is None:
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return
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if issubclass(exctype, self._exceptions):
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return True
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if issubclass(exctype, BaseExceptionGroup):
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match, rest = excinst.split(self._exceptions)
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if rest is None:
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return True
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raise rest
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return False
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