# -*- coding:utf-8 -*-
account_file=('C:\Users\guigu\Desktop\user.txt')
lock_file=('C:\Users\guigu\Desktop\lock.txt')
f = file(account_file)
account_list = f.readlines()
f.close()
while True:
    f = file(lock_file)
    lock_list=[]
    for i in f.readlines():
        line = i.strip('\n')
        lock_list.append(line)
    f.close()
    loginSuccess = False
    username=raw_input("username:").strip()
    if username in lock_list:
        print "sorry,you are already in the block list,get the fuck out!"
        break
    for line in account_list:
        line=line.split()
        if line[0] == username:
            for i in range(3):
                password = raw_input('password:').strip()
                if password == line[1]:
                    print "welcome %s login my system" % username
                    loginSuccess = True
                    break
　　　　　　　　　　

　　　　　　　　　　else:
　　　　　　　　　　　　print "password error"

            else:
                f =file(lock_file,'a')
                f.write('%s\n' %username)
                f.close()
                print "entered,3 times of wrong passwd,going to lock %s" % username
            if loginSuccess == True:break

                
    if loginSuccess == True:break