diy2.py

qqq=3
username = "python"
userpassword = "123456"
while True:
    if qqq>0:
        qqq-=1
        name = input("请输入用户名:")
        password = input("请输入密码:")
        if name == username and password == userpassword:
            print("登录成功!")
            break
        print("用户名和密码错误!请重新输入")
        if username!= name:
            print("sb你连账户都不记得了!!!")
            continue
        if userpassword!=password:
            print("sb密码忘记了就不要登录了!!!")
    else:
        print("sbsbsbsbsbsbsbsbsbsbsbsb")
        break
print("欢迎来到贝尔编程!")