On Thu, 14 Jun 2012 12:46:38 -0700 Ethan Furman <et...@stoneleaf.us> wrote: > > This is no different from what we have with strings now: > > --> 'aA'.islower() > False > --> 'aA'.isupper() > False > --> 'a'.islower() > True > --> 'A'.isupper() > True > > We know that a string cannot be both all-upper and all-lower at the same > time;
We know that because it's common wisdom for everyone (although who knows what oddities the unicode consortium may come up with in the future). Whether a given function argument may be of several kinds at the same time is much less obvious to most people. Regards Antoine. _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
