<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_host_power_status(self):
 """Request the power state of the server. :returns: Power State of the server, 'ON' or 'OFF' :raises: IloError, on an error from iLO. """

        sushy_system = self._get_sushy_system(PROLIANT_SYSTEM_ID)
        return GET_POWER_STATE_MAP.get(sushy_system.power_state)