Terry J. Reedy added the comment: Intentional and documented.
"5.7. Set Types — set, frozenset ... Note, the non-operator versions of union(), intersection(), difference(), and symmetric_difference(), issubset(), and issuperset() methods will accept any iterable as an argument. In contrast, their operator based counterparts require their arguments to be sets. ..." ---------- nosy: +terry.reedy resolution: -> invalid status: pending -> closed versions: +Python 3.4 -Python 3.2 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue17626> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
