[Python-ideas] Function to apply superset of arguments to a function

Hi all, I've written a function [1] called apply_some which takes a set of keywords arguments, filters only those a function is expecting, and calls the function with only those arguments. This is meant to suppress TypeErrors - a way to abstract the logic which checks what arguments a passed-in function accepts. For example: def foo(x=1, y=2): return (x,y) apply_some(foo, y=0, z="hi") // calls foo(y=0) -> (1,0) I'd like to expand this to fill undefined arguments with None, but before I do, does anyone know of any packages/libraries which either do something similar or would make this code cleaner? Cheers, Andrey 1. http://gist.github.com/183375