Python reflection magic

inspectfun.py

import inspect 

def call(fun, **myArgs):
  names, _, _, values = inspect.getargspec(builder)
  defaults = zip(names, values)
  valuesToCallWith = dict(defaults + myArgs.items())
  return fun(**valuesToCallWith)  

def builder(a = 0, b = 2, c = 3):
  return a + b + c

print call(builder, a = 3)           # prints 8
print call(builder, b = 9, c = 1)    # prints 10 
print call(builder, c = 11)          # prints 13