[Python-Dev] Re: PEP 654 -- Exception Groups and except* : request for feedback for SC submission

We believe that we have found a simple way to make it possible to subclass exception groups, with fully functioning split() and subgroup(). See this section in the PEP: https://www.python.org/dev/peps/pep-0654/#subclassing-exception-groups It was also added to the reference implementation. This probably opens new possibilities for adoption strategies of exception groups and except* (in terms of the interaction of exception groups with except).