Python作业--登录接口

作业需求：

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

实现思路：

1.从文件获取用户名密码

2.判断是否在黑名单中

3.验证用户名密码

成功：输出认证成功

错误：判断验证次数，超过3次写入黑名单

userinfo.txt文件格式

{"name":"alex","password":"abc123"}
{"name":"songkunhuang","password":"abc123"}

 # -*- coding: utf-8 -*-
 """
 Created on  10:32 2017/7/27
 @author: Song
 @E-mail: songkunhuang@163.com

 """
 # 输入用户名密码  验证信息从文件读取
 # 认证成功显示欢迎信息
 # 输错三次，锁定用户  保存到文件 黑名单

 # 解析用户文件  json   eval
 userinfo_file = open("userinfo.txt","r")
 user_list = []
 for user in userinfo_file.readlines():
     user = user.replace("\n", "")
     user_list.append(eval(user))

 # 读取黑名单
 blackuserlist_file = open("blackuserlist.txt","w+")
 black_list = []
 for blackuser in blackuserlist_file:
     blackuser = blackuser.replace("\n", "")
     black_list.append(blackuser)

 def sucess(name):
     print("welcome",name)
     exit()

 count = 3
 flag = 0
 while count > 0:
     username_input = input("Username:")
     password_input = input("Password:")
     if username_input in black_list:
         print("账户已经被锁定")
     else:
         for i in user_list:
             if username_input == i.get("name") and password_input == i.get("password"):
                 flag = 1
                 print("认证成功")
                 sucess(name=username_input)
                 break

         if flag == 0:
             count = count - 1
             if count > 0:
                 print("认证失败，你还可以尝试 %d 次" % count)
 else:
     for i in user_list:
         if username_input == i.get("name"):
             blackuserlist_file.write("".join([username_input, "\n"]))
             print("%s 账户已经锁定" % username_input)
     print("无法尝试")

 userinfo_file.close()
 blackuserlist_file.close()