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[Python3网络爬虫开发实战] 1.8-爬虫框架的安装

Python 崔庆才 5841浏览 163评论

我们直接用Requests、Selenium等库写爬虫,如果爬取量不是太大,速度要求不高,是完全可以满足需求的。但是写多了会发现其内部许多代码和组件是可以复用的,如果我们把这些组件抽离出来,将各个功能模块化,就慢慢会形成一个框架雏形,久而久之,爬虫框架就诞生了。

利用框架,我们可以不用再去关心某些功能的具体实现,只需要关心爬取逻辑即可。有了它们,可以大大简化代码量,而且架构也会变得清晰,爬取效率也会高许多。所以,如果有一定的基础,上手框架是一种好的选择。

本书主要介绍的爬虫框架有pyspider和Scrapy。本节中,我们来介绍一下pyspider、Scrapy及其扩展库的安装方式。

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