Marc-Andre Lemburg added the comment: Here's what mxDateTime uses:
>>> import mx.DateTime >>> >>> t1 = mx.DateTime.DateTime(2012,6,30,23,59,60) >>> t2 = mx.DateTime.DateTime(2012,7,1,0,0,0) >>> >>> t1 <mx.DateTime.DateTime object for '2012-06-30 23:59:60.00' at 7fbb36008d68> >>> t2 <mx.DateTime.DateTime object for '2012-07-01 00:00:00.00' at 7fbb36008d20> >>> >>> t2-t1 <mx.DateTime.DateTimeDelta object for '00:00:00.00' at 7fbb35ff0540> >>> (t2-t1).seconds 0.0 >>> >>> t1 + mx.DateTime.oneSecond <mx.DateTime.DateTime object for '2012-07-01 00:00:01.00' at 7fbb360083d8> It preserves the broken down values, but uses POSIX days of 86400 seconds per day to calculate time deltas. It's a compromise, not a perfect solution, but it prevents applications from failing for that one second every now and then. I don't believe there is a perfect solution, since what your application or users expect may well be different. All I can say is that raising exceptions in these rare cases is not what your users typically want :-) ---------- nosy: +lemburg _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue23574> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
