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# _*_ coding: cp936 _*_ //支持中文格式
import sys
import getpass
#admin configuration
username=‘cheeron‘
password=‘1234‘
counter = 0
#认证登录
while True:
if counter <3:
name = raw_input(‘Please input your name: ‘).strip()
if len(name) == 0:
print ‘empty name,try again!‘
continue
#passwd = raw_input(‘Please input your password:‘)
#使用密码隐藏,getpass函数
passwd = getpass.getpass(‘Please input your password‘)
if password == passwd and username == name:
print ‘welcome to sign in!%s‘ % name
else:
print ‘name or password is not valid，please try again!‘
counter+=1
continue
break
else:
print ‘exceeded 3 times user login...exit the script‘
sys.exit()
结果： [root@cheeron lesson1]# ./qr.py Please input your name: empty name,try again! Please input your name: cheeron Please input your password welcome to sign in cheeron... [root@cheeron lesson1]# ./qr.py Please input your name: cheeron Please input your password name or password is not valid，please try again! Please input your name: cheeron Please input your password name or password is not valid，please try again! Please input your name: cheeron Please input your password name or password is not valid，please try again! exceeded 3 times user login...exit the script
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原文地址：http://www.cnblogs.com/cheerong/p/4268842.html
