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Bad error message when inheriting from Generic multiple times#104328

@JelleZijlstra

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@JelleZijlstra
>>> from typing import Generic, TypeVar >>> T = TypeVar("T") >>> U = TypeVar("U") >>> class X(Generic[T], Generic[U]): pass ... Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/Users/jelle/py/cpython/Lib/typing.py", line 1088, in _generic_init_subclass raise TypeError( TypeError: Cannot inherit from Generic[...] multiple types. 

Should say "multiple times".

Noticed by @carljm in #103764 (comment).

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