On Fri, Jan 24, 2020 at 5:24 PM Victor Stinner <[email protected]> wrote: > > You're right that it's not only about list.count(). > > list.count(), list.index(), tuple.count() and tuple.index() all > consider that two elements are equal if id(x) == id(y): >
FWIW, (list|tuple).__eq__ and (list|tuple).__contains__ uses it too. It is very important to compare recursive sequences. >>> x = [] >>> x.append(x) >>> y = [x] >>> z = [x] >>> y == z True -- Inada Naoki <[email protected]> _______________________________________________ Python-Dev mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/[email protected]/message/ILPWRGJOB4AFECGQHOH5LIZ7HPMACXX7/ Code of Conduct: http://python.org/psf/codeofconduct/
