Python之编写登录接口

作业：编写登陆接口

• 输入用户名密码
• 认证成功后显示欢迎信息
• 输错三次后锁定

帐号文件account.txt内容如下：

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liuyueming 123
zhangsan 123
lisi 123

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锁文件account_lock.txt默认为空

 

一,针对用户名和密码有三次机会,假如三次均输入错误,锁定

流程图

 

代码如下

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#!/usr/bin/python #_*_ coding:utf-8 _*_ import os,getpass,sys i = 0 while i < 3:         name = raw_input('请输入用户名:')         lock_file = open('account_lock.txt','r+')         lock_list = lock_file.readlines()         for lock_line in lock_list:                 if name == lock_line:                         sys.exit('用户%s已经锁定' %name)         user_file = open('account.txt','r')         user_list = user_file.readlines()         for user_line in user_file:                 (user,password) = user_line.strip.split()                 if name == user:                 j = 0                 while j < 3:                         passwd = getpass.getpass('请输入密码:')                         if passwd = password:                                 print ('登录成功%s'%name)                                 sys.exit(0)                         else:                                 if j != 2:                                         print('用户 %s 密码错误，请重新输入，还有 %d 次机会' % (name,2 - j))                         j+=1                 else:                         lock_file.write(name + '\n')                         sys.exit('用户 %s 达到最大登录次数，将被锁定并退出' % name)                 else:                         pass         else:                 if i !=2:                         print('用户 %s 不存在，请重新输入，还有 %d 次机会' % (name,2 - i))         i+=1 else:         sys.exit('用户 %s 不存在，退出' % name) lock_file.close()                                                   #关闭LOCK文件 user_file.close()