On Sun, Mar 28, 2010 at 6:51 PM, smichr <smi...@gmail.com> wrote: > I keep running into the following need and wonder if we should do > something about it. > > Whenever I want to run a method over the arguments of an expression > (essential doing a deep processing of an expression) I have to set up > the following filter: > > if expr is None: # because integrals use None as a marker > return None > elif type(expr) in (list, set, tuple): # because integrals use > tuples > return type(expr)([foo(a) for a in expr]) > return expr.func(*[foo(a) for a in expr.args or expr]) # "or expr" > since Atoms don't have args > > Does anyone suggest a better approach or solution to the problem? or > see any problems with the above?
I agree that we should make this easier. You can also look at postorder_traversal and similar methods in sympy/utilities/iterables.py. Do you have some ideas how it could be made simpler (for example by improving integrals and Atoms)? Ondrej -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sy...@googlegroups.com. To unsubscribe from this group, send email to sympy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
