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Title: Loosen some types to avoid pain in real-life situations by ilevkivskyi · Pull Request #4870 · python/typeshed · GitHub

Open Graph Title: Loosen some types to avoid pain in real-life situations by ilevkivskyi · Pull Request #4870 · python/typeshed

X Title: Loosen some types to avoid pain in real-life situations by ilevkivskyi · Pull Request #4870 · python/typeshed

Description: In this diff: Loosen set.__[i]sub__() to allow typical use cases (that work at runtime). Namely, allow removing unicode from a set of str, and allow removing optional values from non-optional sets. Avoid using union return types in cryptography deserialization functions. Tune SupportsItems so that dict implements it on Python 2. About the first item, I think mypy should support the overloads on generic self-types (see https://mypy.readthedocs.io/en/stable/more_types.html#restricted-methods-in-generic-classes), but I am not sure about other type-checkers. cc @JukkaL

Open Graph Description: In this diff: Loosen set.__[i]sub__() to allow typical use cases (that work at runtime). Namely, allow removing unicode from a set of str, and allow removing optional values from non-optional sets...

X Description: In this diff: Loosen set.__[i]sub__() to allow typical use cases (that work at runtime). Namely, allow removing unicode from a set of str, and allow removing optional values from non-optional sets...

Opengraph URL: https://github.com/python/typeshed/pull/4870

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