Python编程：从入门到实践的动手试一试答案（第九章）

#9-1 餐馆class Restaurant():    def __init__(self,restaurant_name,cuisine_type):        self.name = restaurant_name        self.type = cuisine_type    def describe_restaurant(self):        print("Restaurant's name is " + self.name.title() )            print("Cuisine type is " + self.type.title())    def open_restaurant(self):        print('In operation')my_restaurant = Restaurant('金拱门','快餐')my_restaurant.describe_restaurant()my_restaurant.open_restaurant()

#9-2 三家餐馆class Restaurant():    def __init__(self,restaurant_name,cuisine_type):        self.name = restaurant_name        self.type = cuisine_type    def describe_restaurant(self):        print("Restaurant's name is " + self.name.title() )            print("Cuisine type is " + self.type.title())    def open_restaurant(self):        print('In operation')my_restaurant1 = Restaurant('金拱门','快餐')my_restaurant2 = Restaurant('银拱门','中餐')my_restaurant3 = Restaurant('铜拱门','慢餐')my_restaurant1.describe_restaurant()my_restaurant2.describe_restaurant()my_restaurant3.describe_restaurant()

#9-3 用户class User():    def __init__(self,first_name,last_name):        self.first_name = first_name        self.last_name = last_name    def describe_user(self):        print("First name is " + self.first_name.title() )            print("Last name is " + self.last_name.title())    def greet_user(self):        full_name = self.first_name + ' ' + self.last_name        print('Hello ' + full_name.title())user1 = User('ergou','yang')user2 = User('qiqi','jiang')user1.describe_user()user1.greet_user()user2.describe_user()user2.greet_user()

#9-4 就餐人数class Restaurant():    def __init__(self,restaurant_name,cuisine_type):        self.name = restaurant_name        self.type = cuisine_type        self.number_served = 0    def describe_restaurant(self):        print("Restaurant's name is " + self.name.title() )            print("Cuisine type is " + self.type.title())        print('How many people have dinner in the restaurant?  ' + str(self.number_served))    def open_restaurant(self):        print('In operation')    def set_number_served(self,people):        self.number_served = people    def increment_number_served(self,people):        self.number_served += peoplerestaurant = Restaurant('金拱门','快餐')restaurant.describe_restaurant()restaurant.open_restaurant()restaurant.set_number_served(10)restaurant.describe_restaurant()restaurant.increment_number_served(3)restaurant.describe_restaurant()

#9-5 尝试登录次数class User():    def __init__(self,first_name,last_name):        self.first_name = first_name        self.last_name = last_name        self.login_attempts = 0    def describe_user(self):        print("First name is " + self.first_name.title() )            print("Last name is " + self.last_name.title())    def greet_user(self):        full_name = self.first_name + ' ' + self.last_name        print('Hello ' + full_name.title())    def increment_login_attempts(self):        self.login_attempts += 1    def reset_login_attempts(self):        self.login_attempts = 0user1 = User('ergou','yang')user1.describe_user()user1.increment_login_attempts()user1.greet_user()user1.increment_login_attempts()user1.increment_login_attempts()print(user1.login_attempts)user1.reset_login_attempts()print(user1.login_attempts)

#9-6 冰淇淋小店class Restaurant():    def __init__(self,restaurant_name,cuisine_type):        self.name = restaurant_name        self.type = cuisine_type        self.number_served = 0    def describe_restaurant(self):        print("Restaurant's name is " + self.name.title() )            print("Cuisine type is " + self.type.title())        print('How many people have dinner in the restaurant?  ' + str(self.number_served))    def open_restaurant(self):        print('In operation')    def set_number_served(self,people):        self.number_served = people    def increment_number_served(self,people):        self.number_served += peopleclass IceCreamStand(Restaurant):    def __init__(self,restaurant_name,cuisine_type):        super().__init__(restaurant_name,cuisine_type)        self.flavors = ['apple','milk']    def show(self):        print(self.flavors)restaurant = IceCreamStand('金拱门','快餐')restaurant.describe_restaurant()restaurant.show()

#9-7 管理员class User():    def __init__(self,first_name,last_name):        self.first_name = first_name        self.last_name = last_name        self.login_attempts = 0    def describe_user(self):        print("First name is " + self.first_name.title() )            print("Last name is " + self.last_name.title())    def greet_user(self):        full_name = self.first_name + ' ' + self.last_name        print('Hello ' + full_name.title())    def increment_login_attempts(self):        self.login_attempts += 1    def reset_login_attempts(self):        self.login_attempts = 0class Admin(User):    def __init__(self,first_name,last_name):        super().__init__(first_name,last_name)        self.privileges = ["can add post" ,"can delete post" ,"can ban user"]    def show_privileges(self):        print(self.privileges)user = Admin('ergou','yang')user.show_privileges()

#9-8 权限class Privileges():    def __init__(self):        self.privileges = ["can add post" ,"can delete post" ,"can ban user"]    def show_privileges(self):        print(self.privileges)class User():    def __init__(self,first_name,last_name):        self.first_name = first_name        self.last_name = last_name        self.login_attempts = 0    def describe_user(self):        print("First name is " + self.first_name.title() )            print("Last name is " + self.last_name.title())    def greet_user(self):        full_name = self.first_name + ' ' + self.last_name        print('Hello ' + full_name.title())    def increment_login_attempts(self):        self.login_attempts += 1    def reset_login_attempts(self):        self.login_attempts = 0class Admin(User):    def __init__(self,first_name,last_name):        super().__init__(first_name,last_name)        self.privileges = Privileges()user = Admin('ergou','yang')user.privileges.show_privileges()

#9-9 9-10 9-11 9-12略

#9-13 使用OrderedDictfrom collections import OrderedDictfavorite_languages = OrderedDict()favorite_languages['jen'] = 'python'favorite_languages['sarah'] = 'c'favorite_languages['edward'] = 'ruby'favorite_languages['phil'] = 'python'for name, language in favorite_languages.items():      print(name.title() + "'s favorite language is " +          language.title() + ".")

#9-14 骰子from random import randintclass Die():    def __init__(self):        self.sides = 6    def roll_die(self):        x = randint(1, self.sides)        print(str(x))die = Die()for x in range(0,10):    die.roll_die()die.sides = 10for x in range(0,10):    die.roll_die()die.sides = 20for x in range(0,10):    die.roll_die()

#9-15 Python Module of the Week...