[New-bugs-announce] [issue44796] Add __parameters__ and __getitem__ in TypeVar and ParamSpec

[Serhiy Storchaka]

New submission from Serhiy Storchaka <storchaka+cpython at gmail.com>:

Adding __parameters__ and __getitem__ in TypeVar and ParamSpec allows to generalize and simplify the code (especially the C code) and allows to add more runtime checks. It may open ways for further simplification.

Unfortunately it is not compatible with issue44098, so the latter changes should be reverted.

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components: Library (Lib)
messages: 398640
nosy: gvanrossum, kj, serhiy.storchaka
priority: normal
severity: normal
status: open
title: Add __parameters__ and __getitem__ in TypeVar and ParamSpec
type: enhancement
versions: Python 3.11

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue44796>
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