Yeah you can technically craft such pathological edge cases but this is already heavily discouraged. Libraries that change the usual semantics of python's object model are rare.
The only exception I can think of would be numpy which disallows truthiness checks because of the ambiguity of arrays being both scalars and containers. However, this means that the "if x := get_some_array():" construct is already ill-formed so nothing would change by generalizing the left side to arbitrary patterns. And since numpy arrays aren't proper Sequence types you can't use them with the current implementation of pattern matching anyway. So besides carefully crafted pathological edge-cases the "if (...) is not None" construct would be completely redundant. _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/332DUWASBGXRPUHQN2AVEKTV2ASILKLB/ Code of Conduct: http://python.org/psf/codeofconduct/
