Fix inheriting from generic @frozen attrs class #15700
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ikonst
commented
Jul 28, 2023
| @@ -803,7 +803,7 @@ def _make_frozen(ctx: mypy.plugin.ClassDefContext, attributes: list[Attribute]) | |||
| else: | |||
| # This variable belongs to a super class so create new Var so we | |||
| # can modify it. | |||
| var = Var(attribute.name, ctx.cls.info[attribute.name].type) | |||
| var = Var(attribute.name, attribute.init_type) | |||
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Actually, this is problematic with converters, e.g.
def converter(s: str) -> int:
return int(s)
@attrs.define
class C:
x: int = attrs.field(converter=converter)The attribute.init_type will be str here :(
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Ahh, nm, by the time it's deserialized, it's int again (there's also converter_init_type).
|
@hauntsaninja can take a look? |
|
According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅ |
hauntsaninja
approved these changes
Aug 12, 2023
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Fixes #15658.