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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 setUdpJoinerPort(self, portNumber):
 """set Joiner UDP Port Args: portNumber: Joiner UDP Port number Returns: True: successful to set Joiner UDP Port False: fail to set Joiner UDP Port """

        print '%s call setUdpJoinerPort' % self.port
        cmd = 'joinerport %d' % portNumber
        print cmd
        return self.__sendCommand(cmd)[0] == 'Done'