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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 echo(self, data):
 """ Echo test. @type data: string @return: data read from YubiHSM -- should equal `data' @rtype: string @see: L{pyhsm.basic_cmd.YHSM_Cmd_Echo} """

        return pyhsm.basic_cmd.YHSM_Cmd_Echo(self.stick, data).execute()