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Title: Revert "Narrow based on collection containment (#17344)" by JukkaL · Pull Request #17865 · python/mypy · GitHub

Open Graph Title: Revert "Narrow based on collection containment (#17344)" by JukkaL · Pull Request #17865 · python/mypy

X Title: Revert "Narrow based on collection containment (#17344)" by JukkaL · Pull Request #17865 · python/mypy

Description: Optional static typing for Python. Contribute to python/mypy development by creating an account on GitHub.

Open Graph Description: This reverts commit ed0cd4a. See #17864 for context. The implementation has some issues, and I'm reverting the PR to unblock the 1.12 release. Closes #17864. Closes #17841.

X Description: This reverts commit ed0cd4a. See #17864 for context. The implementation has some issues, and I'm reverting the PR to unblock the 1.12 release. Closes #17864. Closes #17841.

Opengraph URL: https://github.com/python/mypy/pull/17865

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og:image:altThis reverts commit ed0cd4a. See #17864 for context. The implementation has some issues, and I'm reverting the PR to unblock the 1.12 release. Closes #17864. Closes #17841.
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Support narrowing literals and enums using the in operator in combination with list, set, and tuple expressions. #17044 https://github.com/python/mypy/pull/17044
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Narrowing inconsistency between == and "in" https://github.com/python/mypy/issues/17864
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