from HTMLParser import HTMLParserimport sysclass 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:            self.title +=data    def handle_endtag(self, tag):        if tag == 'title':            self.readingtitle=0    def gettitle(self):        return self.titlefd=open(sys.argv[1])tp=TitleParser()tp.feed(fd.read())print "Title is: ", tp.gettitle()

参考：Python网络编程基础。