diy2.py

i=3
username = "鞠婧祎"
userpassword = "0618"
while True:
    if i>0:
        name = input("请输入用户名:")
        password = input("请输入密码")
        i=i-1
        if name == username and password == userpassword:
            print("登录成功!")
            break
        if name != username :
            print("用户名错误!请重新输入")
            continue
        if password != userpassword:
            print("密码错误!请重新输入")
    else:
        print("你的用户已锁定，请重新输入")
        exit()
    print("欢迎来到贝尔编程!")