class Driver:    def __init__(self,carType='default',driver='Tom'):        self.carType=carType        self.driver=driver    def toString(self):        return ' '.join([self.driver,'drive',self.carType])        def creatCarFactory(carType):    def setCarDriver(carDriver):        return Driver(carType,carDriver)    return setCarDriverif __name__=="__main__":    bus = creatCarFactory('bus')    xalDriveBus = bus('xal')    timDriveBus = bus('Tim')    car = creatCarFactory('car')    xalDriveCar = car('xal')    print(xalDriveBus.toString())