class?Spidermain(object):
????def?__init__(self):
????????self.urls?=?url_manager.UrlManager()
????????self.downloader?=?html_downloader.HtmlDownloader()
????????self.parser?=?html_parser.HtmlParser()
????????self.outputer?=?html_outputer.HtmlOutputer()

????def?craw(self,?root_url):
????????self.urls.add_new_url(root_url)
????????while?self.urls.has_new_url():
????????????new_url?=?self.urls.get_new_url()
????????????html_cont?=?self.downloader.download(new_url)
????????????new_urls,?new_data?=?self.parser.parse(new_url,?html_cont)
????????????self.urls.add_new_urls(new_urls)
????????????self.outputer.collect_data(new_data)
????????self.outputer.output_html()
if?__name__?==?"__main__":
????root_url?=?"http://baike.baidu.com/view/21087.htm"
????obj_spider?=?Spidermain()
????obj_spider.craw(root_url)

不太清楚問題出在哪里，請(qǐng)大神指點(diǎn)。。。