Arrgh. On 2013-07-28, Simon King <simon.k...@uni-jena.de> wrote: > On 2013-07-28, Simon King <simon.k...@uni-jena.de> wrote: >> Do we want such a behaviour? Or should ClasscallMetaclass.__call__ do >> some assertion that makes sure that it can only return instances of the >> class in question? > > Slight problem: When we do Modules(QQ), then it returns > VectorSpaces(QQ). This is why a type checking in > ClasscallMetaclass.__call__ would currently crash at startup of Sage. > > It might be possible to fix it by making VectorSpaces a sub-class of > Modules. But I don't know if it would be worth doing. Opinions?
It turns out that a lot of stuff in sage.combinat breaks. Apparently some people really want that if C is a class then C(*args,**kwds) is not an instance of this class. My opinion is thus: Changing it would be a can of worms and hence not worth doing. Best regards, Simon -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/groups/opt_out.
