I've built a class for vector space morphisms, aka linear transformations. Mostly this just extends free module morphisms, while making a few distinctions between behavior for vector spaces versus modules over rings. Everything seems to be working fine, but I cannot get equality testing to work.
Equality testing of free module morphisms ends up in a __cmp__() method for "matrix morphisms." My vector space morphisms extend free module morphisms, which in turn extend matrix morphisms. If f and g are two free module morphisms, then f == g, f.__eq__(g), f.__cmp__(g) all employ the matrix morphism method __cmp__() and do the right thing. However, if f and g are two of my vector spaces morphisms, then f.__cmp__(g) does the right thing, but f == g and f.__eq__(g) give the wrong answer (False for equal morphisms) and never "reach down" to employ the __cmp__ method in the base matrix morphism class. Any hints, or places to look for guidance? No amount of searching the developers guide, reference manual, or forums has landed me in the right place. A 95%-complete patch is up at http://trac.sagemath.org/sage_trac/ticket/11556 which has all the details, but there is little point in wading through all that, unless you were interested in reviewing it once complete. ;-) Thanks, Rob -- 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
