python作业习题集锦

 1 for i in range(3):
 2     username=input(‘username:‘).strip()
 3     passwd=input(‘passwd:‘).strip()
 4     if username and passwd:
 5         if username==‘weixiaocui‘ and passwd==‘123456‘:
 6             print(‘%s欢迎登录‘%username)
 7             break
 8         else:
 9             print(‘账号/密码错误‘)
10     else:
11         print(‘账号/密码不能为空‘)
12 else:
13     print(‘错误失败次数太多！‘)