Python设计模式----4.构建者模式

构建者模式：

　　将一个复杂对象的构造与表现进行分离，利用多个步骤进行创建，同一个构建过程可用于创建多个不同的表现

　　构建者模式一般由 Director（指挥官）和 Builder（建设者）构成

 

class Car:
    def __init__(self):
        self.money = None
        self.address = None
        self.car_name = None
        self.buy_time = None

    def __str__(self):
        return f'准备了{self.money}元，去{self.address}看看{self.car_name}，还不错，买了，时间：{self.buy_time}'


class CarBuilder:
    def __init__(self):
        self.car = Car()

    def ready_money(self, money):
        self.car.money = money
        return self
    
    def see_car(self, address):
        self.car.address = address
        return self

    def test_drive(self, car_name):
        self.car.car_name = car_name
        return self

    def buy_car(self, buy_time):
        self.car.buy_time = buy_time
        return self


class Director:
    def __init__(self):
        self.builder = None

    def build(self, builder):
        self.builder = builder
        self.builder.ready_money('100').see_car('4s店').test_drive('单车').buy_car('2020.11.22')
        return self.builder.car


if __name__ == '__main__':
    car_builder = CarBuilder()
    director = Director()

    car = director.build(car_builder)
    print(car)