#encoding = utf-8

 import sys

 user_file = 'user_name.txt'

 lock_file = 'lock_file.txt'

 retry_count = 0

 retry_limit = 3

 while retry_count < retry_limit:

     username = raw_input('\033[32;1mUsername:\033[0m')

     lock_check = file(lock_file)

     for line in lock_check.readlines():
　　　　　　 line = line.split()

         if username == line[0]:

         sys.exit('%s is locked' % username)

     passwd = raw_input('\033[32;1mPassword:\033[0m')

     f = file(user_file,'rb')

     match_flag = False

     for line in f.readlines():

     　　 user,password = line.strip('\n').split()

         if username == user and passwd == password:

         match_flag = True

         break

     f.close()

     if match_flag == False:

     　　 print 'User unmatched'

         retry_count += 1

     else:

     　　print 'Welcome login Learning python'

     　　sys.exit(0)

 else:

     print 'Your account is lock'

     f = file(lock_file,'ab')

     f.write(username+'\n')

     f.close()