Caleb Levy added the comment: @serhiy.storchaka: I don't think that will work.
First of all, x, y = item will raise a ValueError if fed an iterable whose length is not exactly 2, so you would have to check for that. Moreover, if item is something like a dict, for example, then: {"a": 1, "b": 2} in DictLikeMapping(a="b") could return True, which I don't think would be expected behavior. I'm not terribly fond of the instance check myself, but in this case I can't see any other way to do it: the built in dict_items necessarily consists of *tuples* of key-value pairs. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue24434> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com