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Warn on ExceptionGroup subclass without derive #334
Description
While there's probably some usecase which makes sense for this, at most someone could just implement like so:
class CustomEG(ExceptionGroup):
def derive(self, exs):
return ExceptionGroup(self.message, exs)to get the original behavior (I think). From python-trio/trio#3175
Activity
jakkdl commentedon Dec 30, 2024
I was thinking that maybe this would fit better in flake8-bugbear due to being exceptiongroup-related and not necessarily async-specific, but given #302, #311, #301, #298 I think the best approach is creating a new 4xx series of rules for exceptiongroup-specific warnings.
Add ASYNC126 exceptiongroup-subclass-missing-derive
Warn on `ExceptionGroup` subclasses without a `.derive()` method (#448)