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[3.11] gh-88965: typing: fix type substitution of a list of types after initial`ParamSpec` substitution (GH-102808)#102957

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miss-islington merged 1 commit intopython:3.11frommiss-islington:backport-adb0621-3.11

Mar 23, 2023

Merged

[3.11] gh-88965: typing: fix type substitution of a list of types after initial`ParamSpec` substitution (GH-102808)#102957

miss-islington merged 1 commit intopython:3.11frommiss-islington:backport-adb0621-3.11

Mar 23, 2023

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miss-islington commentedMar 23, 2023•
edited by bedevere-bot
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Previously, this used to fail:

fromtypingimport*T=TypeVar("T")P=ParamSpec("P")classX(Generic[P]):f:Callable[P,int]Y=X[[int,T]]Z=Y[str]

(cherry picked from commitadb0621)

Co-authored-by: Nikita Sobolevmail@sobolevn.me
Co-authored-by: Alex WaygoodAlex.Waygood@Gmail.com

Issue:Substitution does not work after ParamSpec substitution of the user generic with a list of TypeVars #88965

pythongh-88965: typing: fix type substitution of a list of types afte…

3d006ac

…r initial `ParamSpec` substitution (pythonGH-102808)Previously, this used to fail:```pyfrom typing import *T = TypeVar("T")P = ParamSpec("P")class X(Generic[P]):    f: Callable[P, int]Y = X[[int, T]]Z = Y[str]```(cherry picked from commitadb0621)Co-authored-by: Nikita Sobolev <mail@sobolevn.me>Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>