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Title: Fix narrowing for AbstractSet and Mapping by hauntsaninja · Pull Request #21352 · python/mypy · GitHub

Open Graph Title: Fix narrowing for AbstractSet and Mapping by hauntsaninja · Pull Request #21352 · python/mypy

X Title: Fix narrowing for AbstractSet and Mapping by hauntsaninja · Pull Request #21352 · python/mypy

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

Open Graph Description: This builds on the tech I added a few days ago in #21281. So we can also get rid of frozenset special case from #21151. I believe we account for all the dangerous_comparison logic now

X Description: This builds on the tech I added a few days ago in #21281. So we can also get rid of frozenset special case from #21151. I believe we account for all the dangerous_comparison logic now

Opengraph URL: https://github.com/python/mypy/pull/21352

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Fix narrowing for AbstractSet and Mapping (https://github.com/python/mypy/commit/2c9ddae00bd6182c6327ed0b5baf89ff8ffd3197
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