Raymond Hettinger added the comment: Python containers are allowed to let identity-imply-equality (the reflesive property of equality). Dicts, lists, tuples, deques, sets, and frozensets all work this way. So for your purposes, you need to use distinct NaN values rather than reusing a single instance of a NaN.
---------- nosy: +rhettinger resolution: -> not a bug status: open -> closed _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue21873> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
