class User():
    def __init__(self, first_name=None, last_name=None):
        self.first_name = first_name
        self.last_name = last_name

    def describe_user(self):
        print("first_name:", self.first_name, 'last_name:', self.last_name)

    def greet_user(self):
        print(self.first_name + self.last_name, '你好!')


class Admin(User):
    def __init__(self, first_name, last_name,):
        super(Admin, self).__init__(first_name, last_name)
        self.privileges=["can add post" , "can delete post" , "can ban user"]
    def show_privileges(self):
        for i in self.privileges:
            print(i)






LH = Admin("LIU", 'HUI')
LH.show_privileges()

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