[issue46938] dataclass __post_init__ recursion

Bar Harel report at bugs.python.org
Sun Mar 6 16:51:20 EST 2022


Bar Harel <bzvi7919 at gmail.com> added the comment:

Actually I'm not sure if the fix is so simple. What happens if B does not inherit from dataclass, but still inherits from A? Do we want to use the new __post_init__? I would assume we do, meaning we don't necessarily want to attach the __post_init__ to the dataclass, but to subclasses.

If so, the suggestion to call __init__() from __post_init__() might be the problematic part, and is what conceptually breaks the inheritance linearization.

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<https://bugs.python.org/issue46938>
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