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写Python爬虫离不开的10个函数,附代码示例与使用场景

  • 2026-08-18 23:11:11
写Python爬虫离不开的10个函数,附代码示例与使用场景

新手写爬虫总是抓不到数据？可能是函数用错了！ 

我整理了Python爬虫中最常用的10个函数，附代码示例与使用场景：

1.requests.get() 发送请求 

2.BeautifulSoup() 解析 HTML 

3.json.loads() 处理 

4.JSON re.findall() 

5.正则提取内容 headers 和 cookies 模拟浏览器行为 

6.代理IP、防封处理也有！

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. 请求信息 : 2026-08-21 19:41:16 HTTP/2.0 GET : https://f.mffb.com.cn/a/506288.html
  2. 运行时间 : 0.327091s [ 吞吐率：3.06req/s ] 内存消耗：4,782.96kb 文件加载：140
  3. 缓存信息 : 0 reads,0 writes
  4. 会话信息 : SESSION_ID=60e1b0b13c2ab533938e069a21ec14fc
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  1. CONNECT:[ UseTime:0.001101s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001197s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000689s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000739s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001261s ]
  6. SELECT * FROM `set` [ RunTime:0.000577s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001358s ]
  8. SELECT * FROM `article` WHERE `id` = 506288 LIMIT 1 [ RunTime:0.011806s ]
  9. UPDATE `article` SET `lasttime` = 1787312476 WHERE `id` = 506288 [ RunTime:0.050926s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000677s ]
  11. SELECT * FROM `article` WHERE `id` < 506288 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.002496s ]
  12. SELECT * FROM `article` WHERE `id` > 506288 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.006570s ]
  13. SELECT * FROM `article` WHERE `id` < 506288 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.037216s ]
  14. SELECT * FROM `article` WHERE `id` < 506288 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.014667s ]
  15. SELECT * FROM `article` WHERE `id` < 506288 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.041131s ]
0.328716s