"<:" Does not give the user any intuition about what it does. "<~" Ok, but same problems as "<:" and precludes the use of "<~~" due to Python's parser. "::" Could be confused with Haskell's type declaration operator.
If we want to avoid confusion with the walrus operator, "options!?=..." is a decent alternative. It can be remembered as "if not there? equal to" [! there? =]. _______________________________________________ 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/NKJAS22WXD2A6RFKOZP7HO4QCCEZVFHA/ Code of Conduct: http://python.org/psf/codeofconduct/
