Hi Burcin, On 25 Okt., 15:26, Burcin Erocal <bur...@erocal.org> wrote: > This initializes a list with a single element for objects which return > None for operator() now. IMHO, this approach is inefficient. In this > case, you should act on the object directly.
I didnt claim that it was efficient - my code was intended to be a work-around to achieve what the OP was asking. Directly acting on the Ginac interface, as you suggest below, is certainly a better way. And as I stated in my PS, I wouldn't insist on introducing an identity operator. After all, a case distinction between leaves and non-leaves in an expression tree can hardly be avoided. > In any case, we should wrap the following ginac interfaces to provide a > better way of doing this: > > * A way to apply a function to the operands of an expression: > > http://www.ginac.de/tutorial/Applying-a-function-on-subexpressions.html > > * or tree traversal: > > http://www.ginac.de/tutorial/Visitors-and-tree-traversal.html +1 Cheers, Simon -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
