AttributeError：'User'对象无'show_privileges'属性问题排查

核心问题一目了然：你创建管理员对象时用了User类，而非自己定义的Admin子类。

Python中，对象能调用的方法完全由它所属的类决定。你确实在Admin类里实现了show_privileges方法，但admin = User("Fred", ...)这行代码创建的是User类的实例——User类本身根本没有这个方法，所以调用admin.show_privileges()时必然报错。哪怕你手动给这个User实例添加了privileges属性，也没法让它拥有Admin类独有的方法。

只需要修改一行代码，把实例化对象的类改成Admin即可：

class User:
    def __init__(self, first_name, last_name, login_attempts, email, location):
        self.first_name = first_name
        self.last_name = last_name
        self.login_attempts = login_attempts
        self.email = email
        self.location = location

    def describe_user(self):
        print(f"{self.first_name} {self.last_name}")
        print(f"You have {self.login_attempts} login attempts")
        print(f"{self.email}")
        print(f"{self.location}")

    def greet_user(self):
        print(f"Hi {self.first_name} {self.last_name} ")

    def location_user(self):
        print(f"Hi {self.first_name},you are from London, South")

    def increment_login_attempts(self, login):
        self.login_attempts = + login

class Admin(User):
    def __init__(self, first_name, last_name, login_attempts, email, location):
        super().__init__(first_name, last_name, login_attempts, email, location)
        self.privileges = []

    def show_privileges(self):
        print("\nPrivileges:")
        for privilege in self.privileges:
            print(f"- {privilege}")

# 将User改为Admin，创建正确的子类实例
admin = Admin("Fred", "Osei", "6", "fred@fredas.com", "London")
fred = User("John", "Chris", "8", "johnchris@life.com", "Manchester")
admin.describe_user()

admin.privileges = ["Can Post", "Can Create Accounts", "Can Delete Account"]
admin.show_privileges()

另外顺便提一句：你代码里show_privileges方法中的变量名priviledge拼写错误，正确应为privilege，虽然不影响运行，但规范拼写能避免后续潜在的问题。

内容的提问来源于stack exchange，提问作者Fred