diy2.py

i=3
username = "python"
userpassword = "123456"
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!=userworrd:
        print("密码错误!请重新输入")
    else:
        print("您的账户已锁定，请带身份证来我司解锁！")
print("欢迎来到贝尔编程!")