2008/9/9 Jason Merrill <[EMAIL PROTECTED]>: > > > def is_constant(f): > return SR(f).number_of_arguments() == 0 > > Since this is so short, in practice there is probably no need to > define the function is_constant. If f can't be coerced to the > symbolic ring, this will throw a TypeError, but that seems like > perfectly acceptable behavior. Just catch it.
On the contrary, I do think that this one-liner function is worth defining, since it turns something a bit obscure which users may well not work out how to do into something easy. John --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
