automatic delegation

[Hallvard B Furuseth]

Is it possible to write a metaclass or something so that
with a class definition not much larger than this:

   class foo:
      def __init__(self, val): self.val = val

operations on a foo instance f will be applied to f.val?
E.g. str(f) -> f.__str__() -> f.val.__str__().

-- 
Hallvard