Armin Rigo <ar...@users.sourceforge.net> added the comment: Note that I "fixed" one case in PyPy: if the class C has no __iter__() but only __radd__(), and we call "somelist += C()". This was done simply by having somelist.__iadd__(x) return NotImplemented in case x is not iterable, instead of propagating the TypeError.
This fix doesn't change the outcome in the case reported here: if there are two possible ways to get a valid answer, then PyPy will systematically prefer the way implemented by the LHS method over the way implemented by the RHS method, whereas CPython might not. ---------- nosy: +arigo _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue11477> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
