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bpo-42195: Override _CallableGenericAlias's __getitem__ #23915

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Merged
merged 1 commit into from
Dec 24, 2020

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@Fidget-Spinner Fidget-Spinner commented Dec 24, 2020

Added __getitem__ for _CallableGenericAlias so that it returns a subclass (itself) of types.GenericAlias rather than the default behavior of returning a plain types.GenericAlias. This fixes repr issues occuring after TypeVar substitution arising from the previous behavior.

https://bugs.python.org/issue42195

Automerge-Triggered-By: GH:gvanrossum

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I think we can skip news, it can share the same news item as the original PR.

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Thanks @Fidget-Spinner for the PR 🌮🎉.. I'm working now to backport this PR to: 3.9.
🐍🍒⛏🤖

miss-islington pushed a commit to miss-islington/cpython that referenced this pull request Dec 24, 2020
Added `__getitem__` for `_CallableGenericAlias` so that it returns a subclass (itself) of `types.GenericAlias` rather than the default behavior of returning a plain `types.GenericAlias`. This fixes `repr` issues occuring after `TypeVar` substitution arising from the previous behavior.
(cherry picked from commit 6dd3da3)

Co-authored-by: kj <28750310+Fidget-Spinner@users.noreply.github.com>
@bedevere-bot bedevere-bot removed the needs backport to 3.9 only security fixes label Dec 24, 2020
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GH-23916 is a backport of this pull request to the 3.9 branch.

miss-islington added a commit that referenced this pull request Dec 24, 2020
Added `__getitem__` for `_CallableGenericAlias` so that it returns a subclass (itself) of `types.GenericAlias` rather than the default behavior of returning a plain `types.GenericAlias`. This fixes `repr` issues occuring after `TypeVar` substitution arising from the previous behavior.
(cherry picked from commit 6dd3da3)

Co-authored-by: kj <28750310+Fidget-Spinner@users.noreply.github.com>
@Fidget-Spinner Fidget-Spinner deleted the getitem-callable branch December 24, 2020 04:26
adorilson pushed a commit to adorilson/cpython that referenced this pull request Mar 13, 2021
Added `__getitem__` for `_CallableGenericAlias` so that it returns a subclass (itself) of `types.GenericAlias` rather than the default behavior of returning a plain `types.GenericAlias`. This fixes `repr` issues occuring after `TypeVar` substitution arising from the previous behavior.
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5 participants