Python判断文本中消息重复次数的方法

#coding:gbk
'''
Created on 2012-2-3
从文件中读取文本，并判断文本中形如“message0”、“message123”这样的消息有多少条是重复的
@author: Administrator
'''
import re
if __name__ == '__main__':
  pattern = u"(message((\d)+))"
  prog = re.compile(pattern)
  # read text from file
  f = open("1003.txt","r")
  text = unicode(f.read())
  f.close()
  result = prog.findall(text)
  message_map = dict()
  redupicate_count = 0
  for message in result:
    if message_map.has_key(message[0]) == True:
      print message[0], "is reduplicate"
      redupicate_count += 1
    else :
      message_map[message[0]] = 1;
  print "total reduplicate message is ", redupicate_count