我的人工智能之路1-Python编程：从入门到实践-2

今天已经学到第9章了，类，有些练习答案分享如下：

9-6：冰淇淋小店

class Restaurant():    def __init__(self, restaurant_name, cuisine_type):        self.restaurant_name = restaurant_name        self.cuisine_type = cuisine_type        self.number_served = 0    def open_restaurant(self):        print("The restaurant is opening")    def describe_restaurant(self):        print("The restaurant name is " + self.restaurant_name +              ", and the cuisine type is " + self.cuisine_type + ".")    def set_number_served(self, num):        self.number_served = num    def increment_number_served(self,inc):        self.number_served += incclass IceCreamStand(Restaurant):    def __init__(self, restaurant_name, cuisine_type, *flavors):        super().__init__(restaurant_name, cuisine_type)        self.flavors = flavors    def back(self):        for i in self.flavors:            print(i)ice = IceCreamStand('waipojia', 'zhongcan','a','b','c')ice.back()

9-7：管理员

class User():    def __init__(self,first_name,last_name):        self.first_name = first_name        self.last_name = last_name    def describe_user(self):        print(self.first_name.title() + ' ' +              self.last_name.title() +              " is a user!")class Admin(User):    def __init__(self,first_name,last_name,*list):        super().__init__(first_name,last_name)        self.privileges = list    def show_privileges(self):        print(self.first_name.title() + ' ' +              self.last_name.title())        for i in self.privileges:            print('\t-' + i + '.')user = Admin('john', 'haha', 'can add post', 'can delete post', 'can ban user')user.show_privileges()

9-8：权限

class User():    def __init__(self,first_name,last_name):        self.first_name = first_name        self.last_name = last_name    def describe_user(self):        print(self.first_name.title() + ' ' +              self.last_name.title() +              " is a user!")class Privileges():    def __init__(self):        self.privileges = ['can add post', 'can delete post', 'can ban user']    def show_privileges(self):        for i in self.privileges:            print('\t-' + i + '.')class Admin(User):    def __init__(self,first_name,last_name):        super().__init__(first_name,last_name)        self.privileges = Privileges()user = Admin('john', 'haha')user.privileges.show_privileges()

9-9：电瓶升级

class Car():    """一次模拟汽车的简单尝试"""    def __init__(self, make, model, year):        self.make = make        self.model = model        self.year = year        self.odometer_reading = 0    def get_descriptive_name(self):        long_name = str(self.year) + ' ' + self.make + ' ' + self.model        return long_name.title()    def read_odometer(self):        print("This car has " + str(self.odometer_reading) + " miles on it.")    def update_odometer(self, mileage):        if mileage >= self.odometer_reading:            self.odometer_reading = mileage        else:            print("You can't roll back an odometer!")    def increment_odometer(self, miles):        self.odometer_reading += milesclass Battery():    """一次模拟电动汽车电瓶的简单尝试"""    def __init__(self, battery_size=70):        """初始化电瓶的属性"""        self.battery_size = battery_size    def describe_battery(self):        """打印一条描述电瓶容量的消息"""        print("This car has a " + str(self.battery_size) + "-kWh battery.")    def get_range(self):        """打印一条消息，指出电瓶的续航里程"""        if self.battery_size == 70:            range = 240        elif self.battery_size == 85:            range = 270        message = "This car can go approximately " + str(range)        message += " miles on a full charge."        print(message)    def upgrade_battery(self):        self.battery_size = 85class ElectricCar(Car):    """电动汽车的独特之处"""    def __init__(self, make, model, year):        """初始化父类的属性"""        super().__init__(make, model, year)        self.battery = Battery()my_tesla = ElectricCar('tesla', 'model s', 2016)print(my_tesla.get_descriptive_name())my_tesla.battery.describe_battery()my_tesla.battery.get_range()my_tesla.battery.upgrade_battery()my_tesla.battery.get_range()

9-14：骰子

#die.pyfrom random import randintclass Die():    def __init__(self, sides=6):        self.sides = sides    def roll_die(self):        print(randint(1, self.sides))

#my_die.pyimport diemy_die = die.Die(20)for i in range(10):    my_die.roll_die()