Vedran Čačić <ved...@gmail.com> added the comment: You've managed to write 3 messages already, without at any point mentioning what _really_ happens when you += something.
a += b means (is closest to) a = type(a).__iadd__(a, b) You focus all the time on __iadd__ call, disregarding that its result it assigned back to a in scope. ---------- nosy: +veky _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue46612> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com