8000 no error when subscripting `AbstractContextManager` when targeting python 3.8 · Issue #16097 · python/mypy · GitHub

no error when subscripting `AbstractContextManager` when targeting python 3.8 #16097

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DetachHead opened this issue Sep 13, 2023 · 1 comment

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bug topic-pep-585

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DetachHead commented

from contextlib import AbstractContextManager

foo = AbstractContextManager[int] # runtime error, no mypy error

DetachHead added the bug label

Contributor

KotlinIsland commented

caused by: (🎁) Add a StubOnlyBase decorator for types that don't actually extend things, but do in the stubs (like Generic) typing#956

The easiest way to handle this situation would be to special case it.

AlexWaygood added the topic-pep-585 label

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