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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 select(self):
 """Enable standard transaction mode. This will enable transaction mode on the channel. Meaning that messages will be kept in the remote server buffer until such a time that either commit or rollback is called. :return: """

        self._tx_active = True
        return self._channel.rpc_request(specification.Tx.Select())