code: def getSensors(self):
          
          sensors = array([])
          sensors = r_[sensors, self._getTotalDemandSensor()]
  #        sensors = r_[sensors, self._getDemandSensor()]
  #        sensors = r_[sensors, self._getPriceSensor()]
  
  #        sensors = r_[sensors, self._getBusVoltageSensor()]
  
  #        sensors = r_[sensors, self._getBusVoltageMagnitudeSensor()]
  #        sensors = r_[sensors, self._getBusVoltageLambdaSensor()]
  #        sensors = r_[sensors, self._getBranchFlowSensor()]
  
  #        logger.info("State: %s" % sensors)
  
          return sensors
docs: Returns the currently visible state of the world as a numpy array
              of doubles.