code: def push_bus(self, tokens):
          
          logger.debug("Pushing bus data: %s" % tokens)
  
          bus = Bus()
          bus.name = tokens["bus_no"]
          bus.v_magnitude = tokens["v_magnitude"]
          bus.v_angle = tokens["v_angle"]
          bus.v_magnitude = tokens["v_magnitude"]
          bus.v_angle = tokens["v_angle"]
  
          self.case.buses.append(bus)
docs: Adds a Bus object to the case.