human
Solve the following python programming problem given the following code:
def __call__(self, * args, **kwargs) : 
    def __repr__() : 
        s = self.f.__doc__.replace ('alpha', ('%.4f' % kwargs ['alpha'])).replace ('beta', ('%.4f' % kwargs ['beta'])) 
        return s 
self.__doc__ = __repr__ () 
    self.__repr__ = __repr__ 
    self.__str__ = args 
    return self.f (* args, ** kwargs) 

    
    

    Fix the buggy line: self.__str__ = args
assistant
#Here is Python program to fix the buggy line: self.

self.__str__ = __repr__