On Fri, Dec 6, 2019 at 5:42 PM Matthias Bussonnier <bussonniermatthias@gmail.com> wrote:
[...]
My original request on bpo[1] was for `re` which is actively maintained, but I was advised to ask for a more general policy and thoughts here as whether renaming of a an exception was acceptable.

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Matthias
1: https://bugs.python.org/issue38981

I wish you had linked to that issue in your original post. It's much easier to discuss a general policy with a concrete example in hand than from an abstract description of the problem. (At least, it is for me. And e.g. the US Supreme Court agrees.)

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--Guido van Rossum (python.org/~guido)