Create a wrapper class to call a pre and post function around existing functions?

Question

I want to create a class that wraps another class so that when a function is run through the wrapper class a pre and post function is run as well. I want the wrapper class t

Answer 1

I have just noticed in my original design there is no way of passing args and kwargs to the wrapped class, here is the answer updated to pass the inputs to the wrapped function...

class Wrapper(object):
def __init__(self,wrapped_class,*args,**kargs):
    self.wrapped_class = wrapped_class(*args,**kargs)

def __getattr__(self,attr):
    orig_attr = self.wrapped_class.__getattribute__(attr)
    if callable(orig_attr):
        def hooked(*args, **kwargs):
            self.pre()
            result = orig_attr(*args, **kwargs)
            self.post()
            return result
        return hooked
    else:
        return orig_attr

def pre(self):
    print ">> pre"

def post(self):
    print "<< post"