1 # 练习9-1 2 """9-1 餐馆 ：创建一个名为Restaurant 的类，其方法__init__() 设置两个属性：restaurant_name 和cuisine_type 。创建一个名 3 为describe_restaurant() 的方法和一个名为open_restaurant() 的方法，其中前者打印前述两项信息，而后者打印一条消息，指出餐馆正在营业。 4 根据这个类创建一个名为restaurant 的实例，分别打印其两个属性，再调用前述两个方法。 5 9-2 三家餐馆 ：根据你为完成练习9-1而编写的类创建三个实例，并对每个实例调用方法describe_restaurant() 。 6 9-3 用户 ：创建一个名为User 的类，其中包含属性first_name 和last_name ，还有用户简介通常会存储的其他几个属性。在类User 中定义一个名 7 为describe_""" 8 9 class Restaurant(): 10 """餐馆信息""" 11 12 def __init__(self, name, type): 13 """餐馆基本信息""" 14 self.name = name 15 self.type = type 16 17 def describe(self): 18 """sasas""" 19 print(self.name.title() + " is " + self.type.title() + " restaurant.") 20 21 def open_restaurant(self): 22 print(self.name.title() + " is openning.") 23 24 25 hitakaya = Restaurant("hitakaya", "Japanese") 26 hitakaya.describe() 27 hitakaya.open_restaurant() 28 matsuya = Restaurant("matsuya","japanese") 29 matsuya.describe() 30 haidilao = Restaurant("haidilao","Chinese") 31 haidilao.describe() 32 33 class User(): 34 """储存用户信息""" 35 def __init__(self,first_name,last_name): 36 """初始化信息""" 37 self.first_name = first_name 38 self.last_name = last_name 39 40 def describe(self): 41 """pirnt uesrs's infos.""" 42 print(self.first_name.title() + " " + self.last_name.title()) 43 44 def greet_user(self): 45 print( 46 self.first_name.title() + " " + self.last_name.title() + 47 " Welcome!") 48 49 phyllis_ryo = User("phyllis","ryo") 50 phyllis_ryo.describe() 51 phyllis_ryo.greet_user() 52 """ 53 class Car(): 54 --snip-- 55 ❶ def update_odometer(self, mileage): 56 """将里程表读数设置为指定的值""" 57 self.odometer_reading = mileage 58 my_new_car = Car('audi', 'a4', 2016) 59 print(my_new_car.get_descriptive_name()) 60 ❷ my_new_car.update_odometer(23) 61 my_new_car.read_odometer() 62 """ 63 64 class Restaurant(): 65 """餐馆信息""" 66 def __init__(self, name, type): 67 """餐馆基本信息""" 68 self.name = name 69 self.type = type 70 self.number_served = 0 71 72 def describe(self): 73 """sasas""" 74 print(self.name.title() + " is " + self.type.title() + " restaurant.") 75 76 def open_restaurant(self): 77 print(self.name.title() + " is openning.") 78 79 # def number_served(self): # 此处函数名与参数名重合 80 def print_number_served(self): 81 print(str(self.number_served) + " people have been this restaurant.") 82 83 def set_number_served(self,number_served): 84 self.number_served = number_served 85 86 def increment_number_served(self,increment_served): 87 self.number_served += increment_served 88 89 90 matsuya = Restaurant("matsuya","japanese") 91 matsuya.describe() 92 matsuya.print_number_served() 93 matsuya.number_served = 200 94 matsuya.print_number_served() 95 matsuya.set_number_served(100) 96 matsuya.print_number_served() 97 matsuya.increment_number_served(10) 98 matsuya.print_number_served() 99 100 101 class User(): 102 """储存用户信息""" 103 def __init__(self,first_name,last_name): 104 """初始化信息""" 105 self.first_name = first_name 106 self.last_name = last_name 107 self.login_attempts = 0 108 109 def describe(self): 110 """pirnt uesrs's infos.""" 111 print(self.first_name.title() + " " + self.last_name.title()) 112 113 def greet_user(self): 114 print( 115 self.first_name.title() + " " + self.last_name.title() + 116 " Welcome!") 117 118 def increment_login_attempts(self): 119 self.login_attempts += 1 120 121 def reset_login_attempts(self): 122 self.login_attempts = 0 123 124 phyllis = User("phyllis","ryo") 125 phyllis.describe() 126 phyllis.increment_login_attempts() 127 phyllis.increment_login_attempts() 128 phyllis.increment_login_attempts() 129 print(phyllis.login_attempts) 130 phyllis.reset_login_attempts() 131 print(phyllis.login_attempts) 132 133 134 class ElectricCar(Car): 135 """电动汽车的独特之处""" 136 def __init__(self, make, model, year): 137 """初始化父类的属性""" 138 super().__init__(make, model, year) 139 9.3.2 Python 2.7中的继承 140 在Python 2.7中，继承语法稍有不同，ElectricCar 类的定义类似于下面这样： 141 class Car(object): 142 def __init__(self, make, model, year): 143 --snip-- 144 class ElectricCar(Car): 145 def __init__(self, make, model, year): 146 super(ElectricCar, self).__init__(make, model, year) 147 --snip--