How to use the fire.partition_query.PartitionQuery function in fire

def connect_rvo2_with_smoke_query(self):

        for floor in self.floors:
            try:
                floor.smoke_query = PartitionQuery(floor=floor.floor)
            except Exception as e:
                self.wlogger.error(e)
                exit(1)
            else:
                self.wlogger.info('Smoke query connected to floor: {}'.format(floor.floor))

def room_leaves(self,ee):# {{{
        self.partition_query[self.floor]=PartitionQuery(self.floor)
        room=self.partition_query[self.floor].xy2room(ee)
        closest={ 'len': 999999999, 'name': None, 'x': None, 'y': None }

        leaves={}
        for door in self._room_exit_doors(room):
            dest=self._move_dest_around_door({'e': ee, 'door': door, 'room': room})
            ll=self.path_length(ee,dest)
            leaves[ll]=(dest, door['name'])

        best_point, best_name=leaves[min(leaves.keys())]
        best_path=self.nav_query(ee, best_point, 300)
        candidates={'best_point': best_point, 'best_name': best_name, 'best_path': best_path, 'all': list(leaves.values())}
        return candidates