python学习 登陆验证

 #!/usr/bin/env python
 #-*- coding=utf-8 -*-
 #----------------导入模块------------------------------
 import os
 import sys

 #----------------设置账户密码------------------------------
 user_name = ['root', 'hyg', 'None']
 user_passwd = ['123qwe', '', 'None']
 file_list = '/home/hyg/py/file/user_db.txt'
 #----------------登陆验证------------------------------
 def user_login ():
   i = 0
   def passwd_login ():
     while True:
       global NAME_INPUT
       NAME_INPUT = raw_input("请输入您的用户名：").strip()
       if len(NAME_INPUT) == 0:
         print "用户名不能为空!"
         continue
       else:
         break
     return

   passwd_login()

   while True:
     if i < 3:
       passwd_input = raw_input("请输入您的密码：")
       if len(passwd_input) == 0:
         print "密码不能为空！"
         continue

       elif NAME_INPUT not in user_name:
         print("您输入的密码有误，请您重新输入！")
         i += 1
         continue

       else:
         if passwd_input == user_passwd[user_name.index(NAME_INPUT)]:
           print("您好%s,欢迎登陆员工信息查询系统！") % NAME_INPUT
           break
         else:
           print("密码有误，请重新输入您的密码")
           i += 1
           continue
         break
       break
     else:
       print "您的密码输错3次请您重新核对账号和密码！"
       i = 0
       passwd_login()
       continue
 user_login()
 print("OK")