human
Solve the following python programming problem given the following code:
def obsolete_setter(setter, attrname) : 
    def newsetter(self, value) : 
        c = self.__class__.__name__ 
        msg = ('%s.%s is not modifiable, use %s.replace() instead' % (c, attrname, c)) 
        raise AttributeError (msg) 
return attrname 

    
    

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

return def newsetter(