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gh-144386: Add support for descriptors in ExitStack and AsyncExitStack - #144420
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serhiy-storchaka merged 3 commits intoFeb 4, 2026
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…itStack __enter__(), __exit__(), __aenter__(), and __aexit__() can now be arbitrary descriptors, not only normal methods, for consistency with the "with" and "async with" statements.
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February 3, 2026 12:48
ncoghlan
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The general approach looks right to me, but is it feasible to avoid adding the dependency on the inspect module by moving that helper function somewhere lower in the import stack?
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Lib/contextlib.py
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In the absence of a Python binding for the actual special method lookup logic, the lazy import looks like a reasonable mitigation to me.
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…itStack (python#144420) __enter__(), __exit__(), __aenter__(), and __aexit__() can now be arbitrary descriptors, not only normal methods, for consistency with the "with" and "async with" statements.
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…itStack (python#144420) __enter__(), __exit__(), __aenter__(), and __aexit__() can now be arbitrary descriptors, not only normal methods, for consistency with the "with" and "async with" statements.
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__enter__(), __exit__(), __aenter__(), and __aexit__() can now be arbitrary descriptors, not only normal methods, for consistency with the "with" and "async with" statements.