[ruff] Allow dataclass attribute value instantiation from nested frozen dataclass (RUF009)#20352
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ntBre
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Sep 12, 2025
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Thank you! This makes sense to me
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Summary
Resolves #20266
Definition of the frozen dataclass attribute can be instantiation of a nested frozen dataclass as well as a non-nested one.
Problem explanation
The
function_call_in_dataclass_defaultfunction is invoked during the "defined scope" stage, after all scopes have been processed. At this point, the semantic references the top-level scope. WhenSemanticModel::lookup_attributeexecutes, it searches for bindings in the top-level module scope rather than the class scope, resulting in an error.To solve this issue, the lookup should be evaluated through the class scope.
Test Plan