human
Solve the following python programming problem given the following code:
@ classmethod 
def _add_simple_method(cls, name, tag, req_fmt, res_fmt) : 
    def f(self, * args) : 
        r = self._simple_call (name, tag, req_fmt, res_fmt, list (args)) [5 :] 
        n = len (r) 
        if (n == 1) : 
            return r [0] 
else : 
            if (n > 1) : 
                return r 
setattr (req_fmt, name, f) 

    
    

    Fix the buggy line: setattr (req_fmt, name, f)
assistant
#Here is Python program to fix the buggy line: setattr (req_fmt, name, f)
.

setattr (cls, name, f)