Dear Ryan, On Thu, Mar 17, 2011 at 8:34 PM, Ryan Hinton <iob...@email.com> wrote: > Where are the comparison operators for graphs implemented? I can find > ``__eq__`` in graphs/generic_graph.py, but I can't find any others.
There is also __ne__. Comparison was implemented in Sage for a while, but we changed from using __cmp__ to using __eq__ and __ne__ in #2433 (March 2008). You may remember #2506 as fallout of this patch. This was originally requested in #729, and erroneously that ticket points to #749 as its duplication-- #749 in fact does not replace the __cmp__ function. The patch at #2433 is simply a link (to an extinct file) because the file was too big to upload-- this was a major overhaul ticket. For the full changeset, see the mercurial repo: http://hg.sagemath.org/sage-main/rev/dbe53cb3e5f7 I still feel like it is silly to implement six different functions instead of a __cmp__ function. Why was it ever suggested that this should change in the first place? I think we should certainly support some arbitrary total ordering on graphs, and I don't see why it shouldn't be via a __cmp__ function. Jason-- You originally requested this. Why? I'd be happy to reimplement <, etc. for graphs but would like to know the correct way to do so. -- Robert L. Miller http://www.rlmiller.org/ -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
