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Improve error message for __class_getitem__ = None #92114

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serhiy-storchaka opened this issue May 1, 2022 · 0 comments · Fixed by #92115
Closed

Improve error message for __class_getitem__ = None #92114

serhiy-storchaka opened this issue May 1, 2022 · 0 comments · Fixed by #92115
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expert-typing type-feature A feature request or enhancement

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serhiy-storchaka commented May 1, 2022

In #88089 (comment) @gvanrossum suggested to set __class_getitem__ = None if we want to make a subclass of indexable class (like tuple or dict) non-indexable. Indeed, it causes indexing to raise a TypeError, but with general message: "'NoneType' object is not callable".

It could be improved.
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gh-92114: Improve error message for types with __class_getitem__ = None serhiy-storchaka/cpython
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