本文以实例形式讲述了Python实现抓取网页并解析的功能。主要解析问答与百度的首页。分享给大家供大家参考之用。

主要功能代码如下：

?123456789101112131415161718192021222324252627282930313233343536373839404142434445 #!/usr/bin/python #coding=utf-8 import sys import re import urllib2 from urllib import urlencode from urllib import quote import time maxline = 2000 wenda = re.compile("href=\""") baidu = re.compile("<a href=\"".*?>更多知道相关问题.*?</a>") f1 = open("baidupage.txt","w") f2 = open("wendapage.txt","w") for line in sys.stdin: if maxline == 0: break query = line.strip(); time.sleep(1); recall_url = "=" + query; response = urllib2.urlopen(recall_url); html = response.read(); f1.write(html) m = wenda.search(html); if m: if m.group(1) == "110": print query + "\twenda\t0"; else: print query + "\twenda\t1"; else: print query + "\twenda\t0"; recall_url = "=" + query +"&ie=utf-8"; response = urllib2.urlopen(recall_url); html = response.read(); f2.write(html) m = baidu.search(html); if m: print query + "\tbaidu\t1"; else: print query + "\tbaidu\t0"; maxline = maxline - 1; f1.close() f2.close()

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