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AI应用编程案例27~帮我写一个Python爬虫,目标是豆瓣电影Top250

  • 2026-06-30 07:49:53
AI应用编程案例27~帮我写一个Python爬虫,目标是豆瓣电影Top250

📌 场景描述:每次写爬虫最烦的不是解析逻辑,而是那些防爬机制(IP限制、验证码、JS加密)。传统写法要死磕

"requests"、

"selenium"和反爬对抗,现在直接用Vibe Coding让AI搞定这套“防御系统”。

💡 Prompt原文:

帮我写一个Python爬虫,目标是豆瓣电影Top250(https://movie.douban.com/top250)。

核心需求:

- 用

"requests"+

"BeautifulSoup",不要用selenium(太重了)。

- 必须模拟真人浏览器:带随机User-Agent、Referer,自动处理Cookie。

- 反反爬策略:每爬一页随机延时1-3秒,遇到429/403自动重试3次。

- 数据清洗:提取排名、电影名、评分、引言,存成

"douban_top250.csv"。

- 异常处理:网络超时或解析失败时跳过,不要崩。

Harness约束:

- 代码里不要写死固定的User-Agent列表,用

"fake_useragent"库动态生成。

- 用

"logging"记录爬取进度和错误,不要只print。

- 如果豆瓣返回“检测到异常请求”,直接休眠10秒再重试。

🔍 技巧拆解:

1. Vibe Coding精髓:不说“怎么爬”,只说“别被ban”。直接提“反反爬”、“模拟真人”、“自动重试”,让AI把防御逻辑封装好,你只管收数据。

2. 痛点爆破:传统写爬虫要查header格式、重试机制代码,现在直接一句“遇到429重试3次”,AI帮你填坑。

3. Harness Engineering:通过约束(如“不要写死User-Agent”、“必须用logging”),给AI套上缰绳,防止它生成简陋或不安全的代码,确保产出是生产可用的。

🎯 效果预期:直接生成一个开箱即用的爬虫脚本,运行后自动处理反爬逻辑,你只需要喝着咖啡等

"csv"文件生成,完全不用碰HTTP协议细节。

⚡ 进阶变体:

- 动态代理池:加一句“如果连续3次被封IP,自动切换代理池(从

"proxy_list.txt"读取)”,让AI帮你写代理轮询逻辑。

- API化:加一句“把爬虫封装成Flask API,

"GET /movies"返回JSON”,直接变微服务。

2026.05.12

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  139. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/runtime/temp/067d451b9a0c665040f3f1bdd3293d68.php ( 11.98 KB )
  140. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000812s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000837s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.003394s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000315s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000516s ]
  6. SELECT * FROM `set` [ RunTime:0.000229s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000563s ]
  8. SELECT * FROM `article` WHERE `id` = 493287 LIMIT 1 [ RunTime:0.004209s ]
  9. UPDATE `article` SET `lasttime` = 1783077591 WHERE `id` = 493287 [ RunTime:0.006952s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000252s ]
  11. SELECT * FROM `article` WHERE `id` < 493287 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000491s ]
  12. SELECT * FROM `article` WHERE `id` > 493287 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000453s ]
  13. SELECT * FROM `article` WHERE `id` < 493287 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.004737s ]
  14. SELECT * FROM `article` WHERE `id` < 493287 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.020527s ]
  15. SELECT * FROM `article` WHERE `id` < 493287 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.023716s ]
0.258179s