On Fri, Sep 23, 2011 at 1:23 PM, Ethan Furman <et...@stoneleaf.us> wrote: > The only reason I'm aware of at the moment is to prevent loss of > functionality from 2.x range to 3.x range. > > I'm -0 with a decision to not have range be orderable; but I understand > there are bigger fish to fry. :)
I don't believe there's a valid use case for ordering ranges. As for backwards compatibility, apparently nobody cares or we would've heard about it. > My original concern was that the comparison methods were there at all, but > looking around I see object has them, so it makes sense to me now. I had > thought I would have to implement them if I went ahead with an frange (for > floats). [...]> So the question becomes, Why does it implement the Sequence ABC? Because the > original range returned a list and those operations made sense? Because all operations on Sequence make sense: you can iterate over a range, it has a definite number of items, and so on; all other sequence operations can be derived from that easily (and in fact they almost all be done in O(1) time). -- --Guido van Rossum (python.org/~guido) _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
