_sage_init_ sounds like the right solution. The problem is that for many objects, printing all the information that would make them reproducible is really ugly. For example, if I have
[1 2] [3 4] Is this over the integers, or the rationals, or the integers mod 17? Or perhaps it's a symbolic matrix, or over a polynomial ring of a finite field of a particular modulus. Of course, this could be incorporated into the representation, but one doesn't usually want to see it unless it is explicitly asked for. For this reason, most of the focus has been on having good pickling/ unpicking support. - Robert On Mar 4, 2008, at 10:59 AM, Jason Grout wrote: > This morning I tried to copy a matrix output, edit it, and create a > new > matrix. It was frustrating because there seemed to be no way to > easily > cut and paste output into input. This afternoon a person I was > showing > Sage to also had the same concern. > > There has been discussion before on the python convention of str > versus > repr, especially in light of the python docs: > > "repr(object) > Return a string containing a printable representation of an > object. > This is the same value yielded by conversions (reverse quotes). It is > sometimes useful to be able to access this operation as an ordinary > function. For many types, this function makes an attempt to return a > string that would yield an object with the same value when passed to > eval()." > > For matrices, repr() and str() yield the same output which is pretty > much useless to try to cut and paste back into input. > > Please let me know if > > * I should not implement repr for matrices and graphs in > accordance to > the python docs. > > * There is another function, like the input_form that mabshoff > suggested on 2386, which could give a code-like representation of an > object if possible? > > > Thanks, > > Jason > > > --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
