diy2.py

username = "p"
userpassword = "123456"
h=3
while True:
    if h<0
        name = input("请输入用户名:")
        password = input("请输入密码:")
        h-=1
        if name == username and password == userpassword:
            print("登录成功!")
            break
        elif name!=username:
            print("用户名错误")
            continue
        else:
            print("密码错误")
    else:
        print("您的账户已被锁定，请带身份证到我司办理")
        exit()
print("欢迎来到贝尔编程!")