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ScrapyCreateSearchWeb

聚集Python分布式爬虫必学框架Scrapy 打造搜索引擎

###学习流程

  • 1.环境配置和基础知识铺垫
  • 2.爬取真实数据
  • 3.scrapy突破反爬虫技术
  • 4.scrapy进阶
  • 5.scrapy redis 分布式爬虫
  • 6.elasticsearch django实现搜索引擎

###技术选型 scrapy vs requests+beautifulsoup

  • 1.requests和beautifulsoup都是库,scrapy是框架
  • 2.scrapy框架可以加入requests和beautifulsoup
  • 3.scrapy基于twisted,性能是最大的优势
  • 4.scrapy方便扩展,提供了很多内置的功能
  • 5.scrapy内置的css和xpath selector非常方便,beautifulsoup最大的缺点就是慢

###爬虫能做什么

  • 1.搜索引擎
  • 2.推荐引擎
  • 3.机器学习的数据样本
  • 4.数据分析

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