1478     def _set_power(self, state, power_method):  argument
1493         if power_method == self.POWER_CONTROL_SERVO:
1497         elif power_method == self.POWER_CONTROL_MANUAL:
1508     def power_off(self, power_method=POWER_CONTROL_RPM):  argument
1516         self._set_power('OFF', power_method)
1519     def power_on(self, power_method=POWER_CONTROL_RPM):  argument
1527         self._set_power('ON', power_method)
1530     def power_cycle(self, power_method=POWER_CONTROL_RPM):  argument
1538         if power_method in (self.POWER_CONTROL_SERVO,
1540             self.power_off(power_method=power_method)
1542             self.power_on(power_method=power_method)