On Fri, Feb 26, 2021 at 3:18 PM Marco Sulla <Marco.Sulla.Python@gmail.com> wrote:
Excuse me if I post here. Maybe is a stupid question: why, instead of
introducing except*, Python can't extend the functionality of except,
so it can do what except* would do?

Good question. Here's an example:
    . . .
except OSError as err:
    if err.errno != ENOENT:
    . . .
If this would catch ExceptionGroup(OSError), the `err` variable would be an ExceptionGroup instance, which does not have an `errno` attribute.

(Irit: Does the PEP answer this question? I couldn't quickly find it in the rejected ideas. I think it's a reasonable question and we should answer it, either in the Rationale or in Rejected Ideas.)

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