spider_main中的 ?root_url ?通過urls.get_new_url()獲取的可爬取的URL

def?craw(self,root_url):
????????count=1
????????self.urls.add_new_url(root_url)
????????while?self.urls.has_new_url():
????????????try:
????????????????new_url=self.urls.get_new_url()
????????????????print?'craw?%d:%s'?%(count,new_url)
????????????????html_cont=self.downloader.download(new_url)
????????????????new_urls,new_data=self.parser.parser(new_url,html_cont)
????????????????self.urls.add_new_urls(new_urls)
????????????????self.outputer.collect_data(new_data)

????????????????if?count==1000:
????????????????????break
????????????????count=count+1
????????????except:
????????????????print?'craw?feild'
????????self.outputer.output_html()
????????

if?__name__=="__main__":
????root_url="http://baike.baidu.com/view/21087.htm"
????obj_spider=SpiderMain()
????obj_spider.craw(root_url)