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no error for collections.abc.MutableMapping is not subscriptable #11529

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KotlinIsland opened this issue Nov 12, 2021 · 1 comment
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no error for collections.abc.MutableMapping is not subscriptable #11529

KotlinIsland opened this issue Nov 12, 2021 · 1 comment
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bug mypy got something wrong topic-runtime-semantics mypy doesn't model runtime semantics correctly

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@KotlinIsland
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from collections.abc import MutableMapping

MutableMapping[int, int]

mypy python-version 3.6 test.py: Success: no issues found in 1 source file
python test.py:

TypeError: 'ABCMeta' object is not subscriptable
@KotlinIsland KotlinIsland added the bug mypy got something wrong label Nov 12, 2021
@sobolevn
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Related python/typeshed#6257

@KotlinIsland KotlinIsland mentioned this issue Nov 23, 2021
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@JelleZijlstra JelleZijlstra added the topic-runtime-semantics mypy doesn't model runtime semantics correctly label Mar 21, 2022
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@JelleZijlstra @sobolevn @KotlinIsland