2.25，, 1 # 练习9-

2.25，, 1 # 练习9-

  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   ? 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 ? 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_name106         self.last_name = last_name107         self.login_attempts = 0108 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 += 1120 121     def reset_login_attempts(self):122         self.login_attempts = 0123 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--

2.25