Day1

# -*- coding:utf-8 -*-
# Author:joycezhou
import os,sys,getpass
count = 0
while count < 3:
    username = 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:
        lock_line = lock_line.strip(‘\n‘)
        if username == lock_line:
            print(‘用户名%s已经被锁定‘% username)
            sys.exit(1)

    user_file = open(‘account.txt‘,‘r‘)
    user_list = user_file.readlines()
    print (user_list)
    for user_line in user_list:
        (user,passwd) = user_line.strip(‘\n‘).split()
        if username == user:
#            print(username)
            p = 0
            while p <3:
                print(username)
                password = input("password:")
                if password == passwd:
                    print("欢迎%s登录系统"%username)
                    sys.exit(1)
                else:
                    if p != 2:
                        print(‘用户%s密码错误，请重新输入，还有%d机会‘ % (username,2-p))
                p += 1
            else:
                lock_file.write(username + ‘\n‘)
                sys.exit("对不起%s用户已被锁定，请联系管理员" % username)

        else:
            pass
    else:
        if count != 2:
            print(‘对不起，%s 输入错误，请重新输入，您还有%d 次机会‘ % (username , 2-count))
    count += 1
else:
    sys.exit(‘用户%s不存在，退出‘ % username)