From http://www.cnblogs.com/rails3/ fetch news.qq.com 新闻标题和内容到文本

fetchnew.py

#coding=utf-8
import sys
import urllib2
import re
import os

def extract_url(info):
    rege="http://news.qq.com/a/\d{8}/\d{6}.htm"
    re_url = re.findall(rege, info)
    return re_url

def extract_sub_web_title(sub_web):
    re_key = "<title>.+</title>"
    title = re.findall(re_key,sub_web)
    return title

def extract_sub_web_content(sub_web):
    re_key = "<div id=\"Cnt-Main-Article-QQ\".*</div>"
    content = re.findall(re_key,sub_web)
    return content

def filter_tags(htmlstr):
    re_cdata=re.compile('//<!\[CDATA\[[^>]*//\]\]>',re.I) #匹配CDATA
    re_script=re.compile('<\s*script[^>]*>[^<]*<\s*/\s*script\s*>',re.I)#Script
    re_style=re.compile('<\s*style[^>]*>[^<]*<\s*/\s*style\s*>',re.I)#style
    re_p=re.compile('<P\s*?/?>')#处理换行
    re_h=re.compile('</?\w+[^>]*>')#HTML标签
    re_comment=re.compile('<!--[^>]*-->')#HTML注释
    s=re_cdata.sub('',htmlstr)#去掉CDATA
    s=re_script.sub('',s) #去掉SCRIPT
    s=re_style.sub('',s)#去掉style
    s=re_p.sub('\r\n',s)#将<p>转换为换行
    s=re_h.sub('',s) #去掉HTML 标签
    s=re_comment.sub('',s)#去掉HTML注释  
    blank_line=re.compile('\n+')#去掉多余的空行
    s=blank_line.sub('\n',s)
    return s

#get news
content = urllib2.urlopen('http://news.qq.com').read()

#get the url
get_url = extract_url(content)

#generate file
f = file('result.txt','w')
i = 15            #新闻起始位置，前面几条格式不一致
flag = 30
while True:
    f.write(str(i-14)+"\r\n")
    
    #get the sub web title and content
    sub_web = urllib2.urlopen(get_url[i]).read()
    sub_title = extract_sub_web_title(sub_web)
    sub_content = extract_sub_web_content(sub_web)

    #remove html tag
    if sub_title != [] and sub_content != []:
        re_content = filter_tags(sub_title[0]+"\r\n"+sub_content[0])
        f.write(re_content.decode("gb2312").encode("utf-8"))
        f.write("\r\n")
    else:
        flag = flag +1
    
    if i == flag:
        break
 
    i = i + 1
    print "Have finished %d news" %(i-15)
f.close()