human
Solve the following python programming problem given the following code:
def cacheable(cache_key, timeout = 3600) : 
    def paramed_decorator(func) : 
        def decorated(self, * args, **kwargs) : 
            key = (cache_key % self.__dict__) 
            res = cache.get (key) 
            if (res == None) : 
                res = func (self, * args, ** kwargs) 
                cache.set (key, res, timeout) 
return res 
decorated.__doc__ = func.__doc__ 
        decorated.__dict__ = func.__dict__ 
        return decorated 
return <MASK> 
    
    Given the code above, what is a proper replacement for <MASK>?
assistant
#Here is a proper replacement for <MASK>.
def paramed_decorator(