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