9-8 权限

1. 项目

编写一个名为 Privileges 的类，它只有一个属性——privileges，其中存储了练习 9-7 所说的字符串列表。

将方法 show_privileges()移到这个类中。在 Admin类中，将一个 Privileges 实例用作其属性。

创建一个 Admin 实例，并使用方法show_privileges()来显示其权限。

 

2. 代码

class User():
    """初始化用户属性"""
    def __init__(self, first_name, last_name, age, profession, login_attempts):
        self.first_name = first_name
        self.last_name = last_name
        self.age = age
        self.profession = profession
        """添加尝试登录次数属性"""
        self.login_attempts = login_attempts

    def describe_user(self):
        """用户信息描述方法"""
        print("User information: " + "
" + self.first_name.title()
              + "." + self.last_name + "
" + str(self.age)
              + "
" + self.profession + ".")

    def greet_user(self):
        """问候方法"""
        print("Hello, " + self.first_name.title() + "." + self.last_name
              + ", welcome to ShangHai.
")

    def increment_login_attempts(self):
        """尝试登录次数的增量方法"""
        self.login_attempts += 1
        print(self.login_attempts)

    def reset_login_attempts(self):
        """重置登录次数方法"""
        self.login_attempts = 0
        print(self.login_attempts)


class Admin(User):
    def __init__(self, first_name, last_name, age, profession, login_attempts):
        super().__init__(first_name, last_name, age, profession, login_attempts)
        self.privileges = Privileges()


class Privileges():
    def __init__(self, privileges=("can add post", "can delete post", "can ban user")):
        self.privileges = privileges

    def show_privileges(self):
        print(self.privileges)


admin = Admin('kevin', 'hou', 30, 'ee', 1)
admin.privileges.show_privileges()

　　

3. 执行结果

('can add post', 'can delete post', 'can ban user')