Ofer Schwarz added the comment: So, this is actually impossible to do. Since exceptions are c-level classes, adding members to ValueError means anything that multiple-inherits from ValueError and any other complex exception gets a multiple bases layout conflict. There's already one such class - _pyio.UnsupportedOperation inherits both ValueError and OSError - but the bigger issue is that this would break compatibility.
After discussing it (face-to-face) with a bunch of core devs, I think the only reasonable course of action is to close the issue and never speak of this again. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue18166> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
