python2设计一个用户登录

 1 #设计一个可以输入3次的登陆程序
 2 #用户登录
 3 import getpass
 4 flag = 3
 5 while flag>0 :
 6     _usr_ =raw_input(‘please enter your username:‘)
 7     _pword_ =getpass.getpass(‘please enter your password:‘)#密文输入
 8     if _usr_ ==‘admin‘ and _pword_==‘123456‘:
 9         print(‘Login successful!‘)
10         break
11     else :
12         print(‘Check your username and password, please!‘)
13     flag-=1