Guido van Rossum wrote: > So why not .get(key, <sentinel>)? You can reuse the sentinel, and this way > it's a single call instead of two -- e.g. the code in Mapping implements both > __contains__() and get() by calling __getitem__() and catching KeyError.
Good point. Another option I've considered is using the `keys` method, since most non-dict mappings would get this called anyways for patterns with `**rest`. All the more reason why we should allow the implementation some flexibility. ;) _______________________________________________ Python-Dev mailing list -- python-dev@python.org To unsubscribe send an email to python-dev-le...@python.org https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/python-dev@python.org/message/RLBJKQNWFOTCBSAJT47J7RO2K26ZFQAL/ Code of Conduct: http://python.org/psf/codeofconduct/
