human
Solve the following python programming problem given the following code:
def __getattr__(self, func) : 
    if ((len (self.valid_funcs) > 0) and (func not in self.valid_funcs)) : 
        raise InvalidFunction ("The function '{0}' does not exist in the StateFactory for '{1}'".format (func, self.module)) 
def make_state(id_, **kwargs) : 
        return State (id_, self.module, func, ** kwargs) 
return self 

    
    

    Fix the buggy line: return self
assistant
#Here is Python program to fix the buggy line: return self
.

return def make_state(