human
Solve the following python programming problem given the following code:
@ classmethod 
def _bind_operator_method(cls, name, op) : 
    ' bind operator method like DataFrame.add to this class ' 
    def meth(self, other, level = None, fill_value = None, axis = 0) : 
        if (not (level is None)) : 
            raise NotImplementedError ('level must be None') 
return map_partitions (op, self._pd, self, other, axis = axis, fill_value = fill_value) 
meth.__doc__ = meth.__doc__ 
    bind_method (cls, name, meth) 

    
    

    Fix the buggy line: meth.__doc__ = meth.__doc__
assistant
#Here is Python code to fix the buggy line: meth.

meth.__doc__ = op.__doc__