On Sun, Jul 25, 2010 at 7:01 PM, Raymond Hettinger <raymond.hettinger@gmail.com> wrote:
P.S.  With rich comparisons, we've lost basics assumptions
like equality operations being reflexsive, symmetric, and
transitive.   We should be cautioned by that experience
and only go down that path again if there is a darned good reason.

Well, it's done, and this would simply complete that.  I don't see how holding the line at __contains__ help anything; we've gone most of the way down the path, and this just gets us a little further along (and, or, and not still being an issue).

Also I don't think this affects reflexive/symmetric/transitive aspects of equality, since any overloading allows that to happen, right?  Rich comparisons affect other things.

I assume this would fall under the moratorium though?

Ian Bicking  |  http://blog.ianbicking.org