使用scrapy实现爬网站例子和实现网络爬虫(蜘蛛)的步骤

复制代码 代码如下:#!/usr/bin/env python# -*- coding: utf-8 -*- from scrapy.contrib.spiders import CrawlSpider, Rulefrom scrapy.contrib.linkextractors.sgml import SgmlLinkExtractorfrom scrapy.selector import Selector from cnbeta.items import CnbetaItemclass CBSpider(CrawlSpider): name = ‘cnbeta’ allowe