If it (compatible __new__ and __init__) needs to be checked at definition time, just try create an instance passing the same arguments you would pass to the base class. If the creation it doesn't raise an exception, that is good enough.
This isn't about theoretical type safety against malice; it is about defining the minimal protocol for an ExceptionGrouping that has to be supported by someone who wants something other than the default flavor. _______________________________________________ Python-Dev mailing list -- python-dev@python.org To unsubscribe send an email to python-dev-le...@python.org https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/python-dev@python.org/message/JW4BFAR7SN23NF7S6TRGOROJIMPDGQEJ/ Code of Conduct: http://python.org/psf/codeofconduct/
