0. 写在前面
网络爬虫：
A Web crawler, sometimes called a spider, is an Internet bot that systematically browses the World Wide Web, typically for the purpose of Web indexing (web spidering)A Web crawler,
阅读背景：
利用python爬虫获取豆瓣读书数据建立书单_doUle_sUn的博客
来源：互联网
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