decorator.py

# http://stackoverflow.com/questions/3118929/implementing-the-decorator-pattern-in-python

class foo(object):
 def f1(self):
 print("original f1")
 def f2(self):
 print("original f2")

class foo_decorator(object):
 def __init__(self, decoratee):
 self._decoratee = decoratee
 def f1(self):
 print("decorated f1")
 self._decoratee.f1()
 def __getattr__(self, name):
 return getattr(self._decoratee, name)

u = foo()
v = foo_decorator(u)
v.f1()
v.f2()