python 比较两个文本的相似性，分词版。

比较两个带有中文文本的相似性。实现到了分词以及余弦定理。

#!/usr/bin/env python# -*- coding: utf-8 -*import refrom math import sqrt#You have to install the python libimport jiebadef file_reader(filename,filename2):    file_words = {}    ignore_list = [u'的',u'了',u'和',u'呢',u'啊',u'哦',u'恩',u'嗯',u'吧'];    accepted_chars = re.compile(ur"[\\u4E00-\\u9FA5]+")    file_object = open(filename)    try:        all_the_text = file_object.read()        seg_list = jieba.cut(all_the_text, cut_all=True)        #print "/ ".join(seg_list)        for s in seg_list:            if accepted_chars.match(s) and s not in ignore_list:                if s not in file_words.keys():                    file_words[s] = [1,0]                else:                    file_words[s][0] += 1    finally:        file_object.close()    file_object2 = open(filename2)    try:        all_the_text = file_object2.read()        seg_list = jieba.cut(all_the_text, cut_all=True)        for s in seg_list:            if accepted_chars.match(s) and s not in ignore_list:                if s not in file_words.keys():                    file_words[s] = [0,1]                else:                    file_words[s][1] += 1    finally:        file_object2.close()    sum_2 = 0    sum_file1 = 0    sum_file2 = 0    for word in file_words.values():        sum_2 += word[0]*word[1]        sum_file1 += word[0]**2        sum_file2 += word[1]**2    rate = sum_2/(sqrt(sum_file1*sum_file2))    print 'rate: '    print ratefile_reader('thefile.txt','thefile2.txt')#该片段来自于http://outofmemory.cn