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从Python入门到数据分析教程!(附学习教程)

  • 2026-02-05 01:03:40
从Python入门到数据分析教程!(附学习教程)
  Python 爬虫想必大家都不陌生，主要用于从互联网上抓取、解析和存储数据，广泛应用于数据采集分析、价格监控比价、搜索引擎优化（SEO）、机器学习与人工智能等领域。
  Python 爬虫是获取外部数据的直接方式，解决了数据分析中 “数据从哪里来” 的核心问题。
  给大家整理了 Python 爬虫全流程超详细教程，让你不走弯路，效率直接翻 2 倍！
  ~

一、基本概念

1.1、什么是爬虫

1.2、Python爬虫组成部分

1.3、URI和URL的概念

1.3.1、网页、网站、网络服务器、搜素引擎

1.3.2、什么是URL

1.4、引入模块

二、urllib库详解

2.1、request模块

2.1.1, urllib.request.urlopen() 函数

案例一:使用urlopen()函数抓取百度

案例二:get请求

案例三:pos请求

案例四:伪装Headers

自定义Headers:

案例五:设置请求超时时间

~

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  3. 缓存信息 : 0 reads,0 writes
  4. 会话信息 : SESSION_ID=83fe655024155e12d3d6a18c4563a986
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  1. CONNECT:[ UseTime:0.000593s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000829s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000305s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000502s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000523s ]
  6. SELECT * FROM `set` [ RunTime:0.000210s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000718s ]
  8. SELECT * FROM `article` WHERE `id` = 472441 LIMIT 1 [ RunTime:0.000451s ]
  9. UPDATE `article` SET `lasttime` = 1770483858 WHERE `id` = 472441 [ RunTime:0.001135s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000256s ]
  11. SELECT * FROM `article` WHERE `id` < 472441 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000456s ]
  12. SELECT * FROM `article` WHERE `id` > 472441 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000561s ]
  13. SELECT * FROM `article` WHERE `id` < 472441 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.005570s ]
  14. SELECT * FROM `article` WHERE `id` < 472441 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001628s ]
  15. SELECT * FROM `article` WHERE `id` < 472441 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001043s ]
0.086590s