Hi Kwankyu, On 2019-03-13, Kwankyu Lee <ekwan...@gmail.com> wrote: > For pickling, you probably just need to implement a __reduce__ method for >> the map. >> > > Why not the category framework provide a default? This also seems to me a > defect of the category framework.
I think of pickling as an implementation detail, whereas the category framework is for general stuff (in particular *mathematical* stuff) that is independent of an implementation. There are of course cases in which a default pickling mechanism makes sense (think of UniqueRepresentation). However, I think that Map is not such a case. Namely, a map is given by a domain, a codomain, and defining data. There could of course be a default implementation of pickling, namely: Provide a slot for the data (the domain and codomain are referenced anyway, although some of the references are weak references). However, it is not the purpose of the category framework to provide a slot for data. So, if one would implement a default __reduce__ method then it would certainly not be part of the category framework, but of the base class for maps. 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 https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
