python学习_day01_for循环练习 

 1 # s1 = '老男孩教育最好的讲师：太白'
 2 # for i in s1:
 3 #     print(i)
 4 # .upper() 不区分大小写的方法
 5 system_username = 'admin'
 6 system_password = '123'
 7 system_code = 'QwEr'
 8 for i in range(3):
 9     username = input('请输入用户名：')
10     password = input('请输入密码：')
11     code = input('请输入验证码：')
12     if code.upper() == system_code.upper():
13         if username == system_username and password == system_password:
14             print('欢迎回来：'+username)
15         else:
16             print('用户名或密码输入错误！')
17     else:
18         print('验证码输入错误！')
19 print('输入错误次数过多，下次再来吧~')

 

posted @ 2020-01-31 22:41  学渣赵同学  阅读(153)  评论(0)    收藏  举报