#coding:utf-8
from?baike_spider?import?url_manager


class?SpadierMain(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):
????????pass


if?_main_=="_main_":
????root_url?="http://baike.baidu.com/view/21087.htm"
????obj_spider?=?SpadierMain()
????obj_spider.craw(root_url)

?只能引入urls ? 其余都不能引入????