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Python入门教程(附详细解释笔记)

  • 2026-06-30 09:45:27
Python入门教程(附详细解释笔记)

  初学者会有疑惑，到底什么是爬虫？简单来说，凡是浏览器能浏览到的数据，爬虫 都能批量采集到。爬虫的核心原理，就是模拟浏览器访问网页，精准提取页面里我们需要的各类数据。

  很多人都想快速上手Python爬虫，这篇内容就给大家讲透爬虫的基础概念，同时讲解urllib、BeautifulSoup4、正则re三大常用库，搭配实战案例手把手教学，帮你快速上手，轻松爬取各类网页数据。

  文章篇幅有限，完整教程已经整理上传到知识库，有需要的朋友可以到后台自行领取学习！

本文来自网友投稿或网络内容，如有侵犯您的权益请联系我们删除，联系邮箱：wyl860211@qq.com 。

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  1. CONNECT:[ UseTime:0.000528s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000675s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000297s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000248s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000475s ]
  6. SELECT * FROM `set` [ RunTime:0.000203s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000599s ]
  8. SELECT * FROM `article` WHERE `id` = 492751 LIMIT 1 [ RunTime:0.001186s ]
  9. UPDATE `article` SET `lasttime` = 1783087095 WHERE `id` = 492751 [ RunTime:0.010139s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000282s ]
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0.127275s