python练习——moudule01——模拟登陆

模拟登陆：
1. 用户输入帐号密码进行登陆
2. 用户信息保存在文件内
3. 用户密码输入错误三次后锁定用户

#! /usr/bin/env python
# -*- coding: utf-8 -*-
# __author__ = "macel"
# Date: 2017/4/27

with open('userdata.txt', 'r') as data,open('lock.txt', 'r') as locked:
    flag = False
    List= []
    while flag == False :
        username = input('please input your username:')
        #将光标放到data的开始位置
        data.seek(0)
        for line in data:
            if line.strip().split(':')[0] == username:
                flag = True
                count = 0
                while flag:
                    locked.seek(0)
                    for line in locked:
                        if line.strip() == username:
                            print('sorry,your accout has been locked!')
                            exit()
                    data.seek(0)
                    password = input('please input your password:')
                    for line in data:
                        name = line.strip().split(":")[0]
                        passwd = line.strip().split(":")[1]
                        List.append(username)
                        if name==username and passwd==password :
                            print('Welcome!')
                            flag= False
                            exit()
                        elif name==username and passwd!=password :
                            count += 1
                            if count==3:
                                with open('lock.txt', 'a') as locked:
                                    locked.write(username)
                                    locked.write('
')
                                print('your account has been locked!')
                                flag = False
                                break
                            else:
                                print('wrong password,please try again!')