Hi, On 2013-02-26, Simon King <simon.k...@uni-jena.de> wrote: >> That's perfect: I don't want this coercion :-) > > No? > ... > So, you *really* don't want a coercion between parents that have > previously evaluated equal? I.e., in a case where the only difference is > the prefix? Then I just change the test above.
And perhaps I also add a ".. TODO::" somewhere in the docs. Namely, if I am not mistaken, comparison on elements should not be implemented by providing __eq__, __ne__ and __cmp__, explicitly invoking the coercion model. Instead, for a *Python* class, one should just define __cmp__ as always, where one can assume that both inputs have identical parents (so, no explicit invocation of the coercion model is needed). Would you agree to leave it is a "todo" to follow the comments on __cmp__ and __richcmp__ from sage.structure.element, and for now just fix the tests? Best regards, Simon -- You received this message because you are subscribed to the Google Groups "sage-combinat-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-combinat-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-combinat-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-combinat-devel?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
