Following issue45711 the redundancy in exc_info is now explicit. This means that we can now safely update places that still use python2-style exception handling code, like:

            exc_type, exc_value = sys.exc_info()[:2]
            try:
                response = dumps(
                    Fault(1, "%s:%s" % (exc_type, exc_value)),
                    encoding=self.encoding, allow_none=self.allow_none)
                response = response.encode(self.encoding, 'xmlcharrefreplace')
            finally:
                # Break reference cycle
                exc_type = exc_value = None

It's not my intention here to go on a search-and-destroy mission to remove all calls to sys.exc_info(), that would cause unnecessary code churn. I am reviewing them to see where the call the sys.exc_info is close to other legacy problems/significant complexity/missing tests.

> It's not my intention here to go on a search-and-destroy mission to remove all calls to sys.exc_info(), that would cause unnecessary code churn. I am reviewing them to see where the call the sys.exc_info is close to other legacy problems/significant complexity/missing tests.

That's my intention too, in argparse it was used to get the currently handled exception value which can be easily accessed by using "as" in exception handling, so it makes sense to change it, not to mention that using exc_info creates a temporary tuple which is of no use in this scenario.

New changeset 45f5f52601ebccb195c19cb0a77beaf7f7dfa56a by Kumar Aditya in branch 'main':
bpo-46510: update Python2-style exception handling in argparse (GH-30881)
https://github.com/python/cpython/commit/45f5f52601ebccb195c19cb0a77beaf7f7dfa56a

New changeset d69d3d8b2fec501e51309221fb1fa4622c8a3db3 by Irit Katriel in branch 'main':
bpo-46510: simplify exception handling code in xmlrpc (GH-30878)
https://github.com/python/cpython/commit/d69d3d8b2fec501e51309221fb1fa4622c8a3db3

New changeset ec7c17ea236f71c8376abcc2930a7c857d417966 by Irit Katriel in branch 'main':
bpo-46510: Add missing test for types.TracebackType/FrameType. Calculate them directly from the caught exception. (GH-30880)
https://github.com/python/cpython/commit/ec7c17ea236f71c8376abcc2930a7c857d417966