After reviewing https://github.com/python/cpython/pull/30777 I had a chance to look through other definitions of `def __class_getitem__`. And I found that the only one left is: `pathlib.PurePath.__class_getitem__`

All other definitions already have this form: `__class_getitem__ = classmethod(GenericAlias)`.

I don't think that there's anything special about `PurePath` in this regard. So, I propose to make `__class_getitem__` to return `GenericAlias` as all other types do.

Initial PR: https://github.com/python/cpython/pull/17498

PR is on its way.

New changeset 1f715d5bd3bc9ff444e109b6bbd13011913681b1 by Nikita Sobolev in branch 'main':
bpo-46483: change `PurePath.__class_getitem__` to return `GenericAlias` (GH-30822)
https://github.com/python/cpython/commit/1f715d5bd3bc9ff444e109b6bbd13011913681b1

Why __class_getitem__ was added in PurePath at first place? PurePath should not be a generic class, unlike to os.PathLike. For os.PathLike the type parameters represent the returning type of os.fspath() (either str or bytes), but the pathlib module only supports paths as strings, so no parametrization is needed.

I think PurePath.__class_getitem__ should be removed.

It looks like __class_getitem__ was added to PurePath at @asvetlov's request  in PR 17498. But, I'm also not quite sure why. The class is not generic in typeshed, so type-checkers will raise an error if you do PurePath[str], even if it is possible to do so at runtime.

Typeshed stub for PurePath: https://github.com/python/typeshed/blob/dff461fc6adef1ec3a4b58af5abdf0cdebf2429a/stdlib/pathlib.pyi#L20

IIRC it was added to reflect the presence of __class_getitem__ method in typeshed.
Please feel free to drop it the method is not really needed.

This issue is not related to the parser, so I am unmarking it.

It is not related to email and asyncio either.

The desmper121 user appears to be a spammer; I am undoing all the changes they made to this BPO ticket.

New changeset 7ffe7ba30fc051014977c6f393c51e57e71a6648 by Nikita Sobolev in branch 'main':
bpo-46483: Remove `__class_getitem__` from `pathlib.PurePath` (GH-30848)
https://github.com/python/cpython/commit/7ffe7ba30fc051014977c6f393c51e57e71a6648

New changeset e0bc8ee945af96f9395659bbe3cc30b082e7a361 by Alex Waygood in branch 'main':
bpo-46483: [doc] pathlib classes no longer support parameterized generics (GH-31281)
https://github.com/python/cpython/commit/e0bc8ee945af96f9395659bbe3cc30b082e7a361

New changeset a7c1cc41696740bb528f4d24816c59e38b8be345 by Miss Islington (bot) in branch '3.9':
bpo-46483: [doc] pathlib classes no longer support parameterized generics (GH-31281)
https://github.com/python/cpython/commit/a7c1cc41696740bb528f4d24816c59e38b8be345

New changeset f2fbfbe0ec57ec39b3099dae62571a48d5fe8729 by Miss Islington (bot) in branch '3.10':
bpo-46483: [doc] pathlib classes no longer support parameterized generics (GH-31281)
https://github.com/python/cpython/commit/f2fbfbe0ec57ec39b3099dae62571a48d5fe8729