解析html

时间：2008-01-02 来源：hkcat2006

最近在学习python,借了本《python网络编程基础》.选几个好玩点的示例发blog上来，可以从其它地方察看。
进行基本的html解析
<HTML>
<HEAD>
<TITLE>这是标题</TITLE>
</HEAD>
<BODY>
这是文本内容
</BODY>
</HTML>
下面是代码，目标是取出TITLE
实际情况要复杂的多,因为有时候标签是不均衡的。先贴个三篇,以后学下去再看情况贴上来吧

#!/usr/bin/env python
from HTMLParser import HTMLParser
import sys

class TitleParser(HTMLParser):
    def __init__(self):
        self.title = ''
        self.readingtitle = 0
        HTMLParser.__init__(self)

    def handle_starttag(self, tag, attrs):
        if tag == 'title':
            self.readingtitle = 1

    def handle_data(self, data):
        if self.readingtitle:
            # Ordinarily, this is slow and a bad practice, but
            # we can get away with it because a title is usually
            # small and simple.
            self.title += data

    def handle_endtag(self, tag):
        if tag == 'title':
            self.readingtitle = 0

    def gettitle(self):
        return self.title

fd = open(sys.argv[1])
tp = TitleParser()
tp.feed(fd.read())
print "Title is:", tp.gettitle()