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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def AddMethods(self, interface, methods):
        '''Add several methods to this object

        interface: D-Bus interface to add this to. For convenience you can
                   specify '' here to add the method to the object's main
                   interface (as specified on construction).
        methods: list of 4-tuples (name, in_sig, out_sig, code) describing one
                 method each. See AddMethod() for details of the tuple values.
        '''
        for method in methods:
            self.AddMethod(interface, *method)