Python @decorator to create decorator

cheat_6.py

"""
Python @decorator to create decorator

http://librosweb.es/eventos/pycon-2014/como-crear-decorators-avanzados-en-las-aplicaciones-python/
"""

import functools

class object_proxy(object):
    def __init__(self, wrapped):
        self.wrapped = wrapped
        try:
            self.__name__= wrapped.__name__
        except AttributeError:
            pass
    @property
    def __class__(self):
        return self.wrapped.__class__
    def __get_attr__(self, name):
        return getattr(self.wrapped, name)
        
class bound_function_wrapper(object_proxy):
    def __init__(self, wrapped, wrapper):
        super(bound_function_wrapper, self).__init__(wrapped)
        self.wrapper = wrapper
    def __call__(self, *args, **kwargs):
        return self.wrapper(self.wrapped, args, kwargs)
    
class function_wrapper(object_proxy):
    def __init__(self, wrapped, wrapper):
        super(function_wrapper, self).__init__(wrapped)
        self.wrapper = wrapper
    def __get__(self, instance, owner):
        wrapped = self.wrapped.__get__(instance, owner)
        return bound_function_wrapped(wrapped, self.wrapper)
    def __call__(self, *args, **kwargs):
        return self.wrapper(self.wrapped, args, kwargs)
    
def decorator(wrapper):
    @functools.wraps(wrapper)
    def _decorator(wrapped):
        return function_wrapper(wrapped, wrapper)
    return _decorator

#test 1
@decorator
def my_function_wrapper(wrapper, args, kwargs):
    print "hello from decorator"
    return wrapper(*args, **kwargs)

@my_function_wrapper
def function():
    print "hello from function"
    return

function()

#result
"""
hello from decorator
hello from function
"""

#test 2
@decorator
def my_function_wrapper(wrapper, args, kwargs):
    print "hello %s from decorator" % args[0]
    r = wrapper(*args, **kwargs)
    print "goodbye %s from decorator you say %s " % (args[0], r)
    return r

@my_function_wrapper
def function(name):
    print "hello from function"
    return "yes!" 

function("David")

#result
"""
hello David from decorator
hello from function
goodbye David from decorator you say yes! 
"""