attrs: Fix emulating hash method logic #17016
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This commit fixes a couple regressions in 1.9.0 from 91be285. Attrs' logic for hashability is slightly complex: * https://www.attrs.org/en/stable/hashing.html * https://github.com/python-attrs/attrs/blob/9e443b18527dc96b194e92805fa751cbf8434ba9/src/attr/_make.py#L1660-L1689 Mypy now properly emulates attrs' logic so that custom `__hash__` implementations are preserved, `@frozen` subclasses are always hashable, and classes are only made unhashable based on the values of `eq` and `unsafe_hash`. Fixes python#17015 Fixes python#16556 (comment) Based on a patch in python#17012 Co-Authored-By: Tin Tvrtkovic <tinchester@gmail.com>
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Add another test for parameter precedence
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According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅ |
JukkaL
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Mar 15, 2024
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Great job @Hnasar ! |
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This commit fixes a couple regressions in 1.9.0 from 91be285.
Attrs' logic for hashability is slightly complex:
Mypy now properly emulates attrs' logic so that custom
__hash__implementations are preserved,@frozensubclasses are always hashable, and classes are only made unhashable based on the values ofeqandunsafe_hash.Fixes #17015
Fixes #16556 (comment)
Based on a patch in #17012
Co-Authored-By: Tin Tvrtkovic tinchester@gmail.com