Alexander Belopolsky added the comment: Eric,
Could you share details of your use-case? My experience with subclassing from basic python types including date/time has been mostly negative. The problem is that when I subclass, I want to inherit the rich set of operations such as +, -, *, etc., and add a few methods of my own. After that, I want to always use instances of my subclass instead of the stdlib one. This does not work because adding instances of my subclass returns an instance of the superclass unless I override __add__ explicitly. (See #2267.) This kills all benefits of subclassing as compared to containment. These days I try to stay away from subclassing date/time, int/float, or anything like that and thus have little incentive to resolve this issue. And it does not look like we have a workable solution. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue5516> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
