Alexander Belopolsky <belopol...@users.sourceforge.net> added the comment:
> I don't understand is why a += b is different from a + b > in this respect. When a is mutable, a += b updates it in-place, so there is no ambiguity: the type of a cannot change. When you do a + b, there is no reason to treat a as more deserving than b when selecting the type of the result. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue9314> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com