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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 poll_command_reponse(self):
 """If the latest request has a response, issue it as a reply to the RPC socket. """

        if self._command.response is not Empty:
            _logger.debug("Sending response %s", self._command.response)
            self.rpc.send(_pack(self._command.response))
            self._command = None