2174     def _set_power(self, state, power_method):  argument
2186         if not power_method:
2187             power_method = self.get_default_power_method()
2194         if power_method == self.POWER_CONTROL_SERVO:
2198         elif power_method == self.POWER_CONTROL_MANUAL:
2202         elif power_method == self.POWER_CONTROL_CCD:
2222     def power_off(self, power_method=None):  argument
2232         self._set_power('OFF', power_method)
2307     def power_on(self, power_method=None):  argument
2316         self._set_power('ON', power_method)
2319     def power_cycle(self, power_method=None):  argument
2328         if not power_method:
2329             power_method = self.get_default_power_method()
2331         if power_method in (self.POWER_CONTROL_SERVO,
2334             self.power_off(power_method=power_method)
2336             self.power_on(power_method=power_method)