On Sun, Sep 13, 2015 at 7:03 PM, Laura Creighton <l...@openend.se> wrote: > In a message of Sat, 12 Sep 2015 20:49:12 -0400, Terry Reedy writes: >>and, if we are stuck with <-intransitivity, what do we do? If >>back-compatibility allowed, I might suggest defining 'lt' or 'less' >>rather than '__lt__' so that sort and bisect don't work with DateTimes. >>Then document that the function is not transitive. > > I think it would be better to document what you are supposed to > do if you have a list of DateTimes and want to sort them, as a > way to get a list of times sorted from the earliest to the latest.
What I'd like to hear (but maybe this won't be possible) would be "less-than is transitive if and only if <X>", where <X> might be something like "all of the datetimes are in the same timezone" or "none of the datetimes fall within a fold" or something. That would at least make sorting possible, but maybe with a first-pass check to ensure transitivity. Vain hope or plausible restriction? ChrisA _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
