Python练习第1天

登录小程序

 username = 'paker'password = '123456'i = 0while i < 3:    _username = input("_username:")    _password = input("_password:")    if _password == password and _username == username:        print("登录成功，欢迎进入程序...")        break    else:        print("请输入正确的用户名和密码!!!")        i += 1    if i == 3:        print("程序已被锁定!")        break;