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别再只会抄代码了:6步跑通Python爬虫,从网页请求到CSV保存一次讲透!

2026-08-21 15:10:57

别再只会抄代码了:6步跑通Python爬虫,从网页请求到CSV保存一次讲透!

很多人第一次接触 Python 爬虫，通常会直接复制一大段代码。程序虽然能运行，却不清楚请求是怎样发出的，也不知道 HTML 为什么能够被解析。一旦网页结构发生变化，代码很容易报错。

其实，基础爬虫的流程并不复杂，这组图将通过 6 个步骤，带你跑通一次完整的爬虫实践。操作时只采集公开、合法的数据，遵守网站规则，并控制访问频率。

掌握这套流程后，还可以将它应用到运维报表、日志整理和安全数据分析等自动化场景中。

#python入门教程#数据分析#编程#数据分析转行#python基础#大学生期末考#零基础学python

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CONNECT:[ UseTime:0.004170s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001901s ]
SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000976s ]
SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000831s ]
SHOW FULL COLUMNS FROM `set` [ RunTime:0.001694s ]
SELECT * FROM `set` [ RunTime:0.000724s ]
SHOW FULL COLUMNS FROM `article` [ RunTime:0.001995s ]
SELECT * FROM `article` WHERE `id` = 508019 LIMIT 1 [ RunTime:0.001314s ]
UPDATE `article` SET `lasttime` = 1787297960 WHERE `id` = 508019 [ RunTime:0.030380s ]
SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000371s ]
SELECT * FROM `article` WHERE `id` < 508019 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000596s ]
SELECT * FROM `article` WHERE `id` > 508019 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000601s ]
SELECT * FROM `article` WHERE `id` < 508019 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000692s ]
SELECT * FROM `article` WHERE `id` < 508019 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000521s ]
SELECT * FROM `article` WHERE `id` < 508019 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.009572s ]

0.237573s

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