04 用户登录，三次重试机会

 

name = 0
while name < 3:
    user = input("请输入用户名:")
    psd = input("请输入密码:")
    if user == "wss" and psd == "123":
        print("登陆成功")
        break
    else:
        print("请重新输入")
    name += 1