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：
#!/usr/bin/python#coding=utf-8import sys import reimport urllib2from urllib import urlencodefrom urllib import quoteimport timemaxline = 2000wenda = re.compile(href=\http://wenda.so.com/q/.+\?src=(.+?)\)baidu = re.compile(更多知道相关问题.*?)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 = http://www.so.com/s?&q= + 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 = http://www.baidu.com/s?wd= + 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()
希望本文所述对大家python程序设计的学习有所帮助。