python设计模式之抽象工厂模式怎么实现

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实现的代码如下：

class FruitClass:    # 品种工厂    def get_name(self, name_index):        if name_index == 0:            name_object = OrangeClass()        elif name_index == 1:            name_object = Hami_MelonClass()        elif name_index == 2:            name_object = GrapeClass()        else:            name_object = None        return name_objectclass OrangeClass:    # 橘子类    def __init__(self):        self.name = "橘子"    def print_name(self):        print("您购买的水果为：%s" % self.name)class Hami_MelonClass:    # 哈密瓜类    def __init__(self):        self.name = "哈密瓜"    def print_name(self):        print("您购买的水果为：%s" % self.name)class GrapeClass:    # 葡萄类    def __init__(self):        self.name = "葡萄"    def print_name(self):        print("您购买的水果为：%s" % self.name)class FruitWeight:    # 称重工厂    def __init__(self, weight):        self.weight = float(weight)    def print_weight(self):        print("该水果的重量为：%.2f千克" % self.weight)class FruitPrice:    # 价格工厂    def get_price(self, name_index, variety):        if name_index == 0:            price_object = OrangePrice(variety)        elif name_index == 1:            price_object = Hami_MelonPrice()        elif name_index == 2:            price_object = GrapePrice()        else:            price_object = None        return price_objectclass OrangePrice:    # 橘子价格类    def __init__(self, variety):        self.variety = variety        if self.variety == 1:            self.price = 8.5        else:            self.price = 11.0    def print_price(self):        print("该水果的单价为:%.2f元/千克" % self.price)class Hami_MelonPrice:    # 哈密瓜价格类    def __init__(self):        self.price = 24.3    def print_price(self):        print("该水果的价格为:%.2f元/千克" % self.price)class GrapePrice:    # 葡萄价格类    def __init__(self):        self.price = 16.2    def print_price(self):        print("该水果的价格为:%.2f元/千克" % self.price)        return self.priceclass FruitPack:    # 包装工厂    def __init__(self, pack):        if pack == 1:            self.pack = "散称"        else:            self.pack = "盒装"    def print_pack(self):        print("该水果的打包方式为：%s" % self.pack)class FruitFactory:    def __init__(self, name_index, weight, variety, pack):        # 任务的分配，品种、重量、价格、包装方式        self.name_object = FruitClass().get_name(name_index)        self.weight_object = FruitWeight(weight)        self.price_object = FruitPrice().get_price(name_index, variety)        self.pack_object = FruitPack(pack)    def print_purchase(self):        # 计算购买的金额        money = self.price_object.price * self.weight_object.weight        print("需要支付的金额共计为：%.2f元" % money)    def show_info(self):        # 展示最终的购买信息        self.name_object.print_name()        self.weight_object.print_weight()        self.price_object.print_price()        self.pack_object.print_pack()        self.print_purchase()        print("-*-" * 20)class Consumer:    # 消费者类    def __init__(self):        print("-*-" * 20)        # 输入原始的"购买需求"信息        self.name = input("请输入你要购买的水果名称：0.橘子 1.哈密瓜 2.葡萄")        self.weight = input("请输入你要购买水果的重量(kg)：")        self.variety = input("如果您购买橘子，我们有2种橘子：0.不买橘子 1.甘橘 2.砂糖橘")        self.pack = input("请您选择该水果的包装方式：1.散称 2.盒装")        print("-*-" * 20)    def request(self):        # 返回相关的购买信息        return self.name, self.weight, self.variety, self.packif __name__ == "__main__":    # 创建顾客    buyer = Consumer()    # 拿到顾客的购买信息    buy_info = buyer.request()    # 使用水果工厂，传达指令至旗下的子工厂并执行购买操作    buy_res = FruitFactory(int(buy_info[0]), int(buy_info[1]), int(buy_info[2]), int(buy_info[3]))    # 购买信息的展示    buy_res.show_info()

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