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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 power_off(self):
 """Turn off receiver"""

        try:
            self.send_command("POWER_OFF")
            self._power = POWER_OFF
            self._state = STATE_OFF
            return True
        except requests.exceptions.RequestException:
            _LOGGER.error("Connection error: power off command not sent.")
            return False