网络爬虫教程

https://piaosanlang.gitbooks.io/spiders/content/02day/README2.html

Scarapy官方教程翻译篇

https://scrapy-chs.readthedocs.io/zh_CN/0.24/topics/selectors.html

Scarapy官方教程翻译篇

https://stevenzhao.gitbooks.io/scrapy-chinese/content/

Python3开发网络爬虫

https://germey.gitbooks.io/python3webspider/content/3.2.2-requests%E7%9A%84%E5%9F%BA%E6%9C%AC%E4%BD%BF%E7%94%A8.html