函数__面向对象(相关联系)

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user_list = []
class UserInfo:
        def __init__(self,username,password,email):
            self.username = username
            self.password = password
            self.email = email
while True:
    user = input("输入用户名:)
    pwd = input("输入密码:")
    email = input("输入邮箱:")
    u = UserInfo(user,pwd,email)  #创建对象
    user_list.append(u)  #把创建好的对象添加到列表
    
    if len(user_list) == 3:
        break

for el in user_ist:  #el 是userinfo的对象
    print(f"用户名:{el.username},邮箱是:{el.email}")

 第二题:=============================================

===========================================

class Account:
    def __init__(self):
        self.user_list = []  #目的是存储用户信息
    def login(self):
        for i in range(3):
            uname = input(">>>")
            upwd = input(">>>")
            for u in self.user_list:
                if unam == u.username and upwd == u.password:
                    print("登陆成功")
                    return
            else:
                print("登陆失败")
    
    def regist(self):
        uname = input(">>>")
        upwd = input(">>>")
        u = User(uname,upwd)  #创建用户
        self.user_list.append(u) #可以继续完善,屏蔽掉重复的用户

    def run(self):  #注册
       self.regist()  #自己类中的方法互相调用,用self调用
       self.regist()  
       self.login()

#if __name__=="__main__":  #当前py文件如果是启动文件,执行这里的代码
obj = Account()
obj.run()