Python编程从入门到实践第九章练习二

练习9-6

# 冰淇淋小店：编写一个名为IceCreamStand的类，让它继承case9-1或case9-4编写的Restaurant类。添加一个名为flavors的属性，用于存储一个由各种口味的冰淇淋组成的列表。编写一个显示这些冰淇淋的方法。创建一个IceCreamStand的实例，并调用这个方法。

class Restaurant:
    """餐馆营业消息"""

    def __init__(self,restaurant_name,cuisine_type):     # 初始化定义属性
        """初始化描述餐馆信息"""
        self.restaurant_name = restaurant_name
        self.cuisine_type = cuisine_type
        self.number_served = 0

    def describe_restaurant(self):     # 描打印餐馆概要信息
        """描述餐馆"""
        print(f"\nRestaurant name:{self.restaurant_name}")
        print(f"Cuisine type:{self.cuisine_type}")

    def open_restaurant(self):     # 表明餐厅正在营业
        """餐厅营业"""
        print("\nRestaurant is serving now!")

    def read_served_number(self):      # 打印就餐人数
        """打印就餐人数"""
        print(f"{self.number_served} people have been eaten in this restaurant.")

    def set_number_served(self,number):     # 设置就餐人数
        """设置就餐人数"""
        self.number_served = number

    def increment_number_served(self,increment):
        """增加就餐人数"""
        self.number_served += increment

class IceCreamStand(Restaurant):
    """冰淇淋信息"""

    def __init__(self,restaurant_name,cuisine_type):
        """初始化父类的属性"""
        super().__init__(restaurant_name,cuisine_type)
        self.flavors = ['vanilla','chocolate','strawberry','cookie dough']

    def describe_icecream(self):
        """描述冰淇淋的口味"""
        print(f"\nThe ice cream in our restraurant are followings:")
        for self.flavor in self.flavors:
            print(self.flavor)

restaurant = Restaurant('dejav','Hunan cuisine')     #根据类Restaurant创建名为restaurant的实例
restaurant.describe_restaurant()   
icecreamstand = IceCreamStand('dejav','Hunan cuisine')
icecreamstand.describe_icecream()