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收藏!51 个 Python 常用代码片段速查

  • 2026-02-26 00:56:21
收藏!51 个 Python 常用代码片段速查
Python 是当下超火的编程语言，语法简单、库又强大，从数据分析、Web 开发到自动化、AI 都能用。本文整理 50 个常用 Python 示例，从基础到进阶全覆盖，帮新手快速上手、提升编程水平。
1.基本文件读写
2.路径处理
3.压缩/解压缩文件
4.列表推导式
5.字典操作
6.集合操作
7.字符串格式化
8.正则表达式
9.Base64编码
10.装饰器
11.Lambda表达式
12.参数解包
13.获取和格式化当前时间
14.日期计算
15.解析日期字符串
16.JSON处理
17.CSV处理
18.XML处理
19.发送HTTP请求
20.解析网页
21.URL解析与构建
22.异常处理
23.日志记录
24.多线程
25.异步编程
26.连接和创建表
27.数据库操作
28.基本类定义
29.属性装饰器
30.魔术方法
31.生成器函数
32.生成器表达式
33.迭代工具
34.创建DataFrame
35.数据选择与过滤
36.数据分析
37.基本图像操作
38.图像处理
39.绘图与保存
40.环境变量操作
41.命令行参数
42.子进程管理
43.单元测试
44.性能测量
45.函数缓存提高性能
46.命名元组
47.枚举类型
48.数据类
49.安全哈希
50.密码安全哈希
51.安全随机数与UUID
看完这些实用代码，相信你对 Python 已经有了更清晰的认识。坚持多练多用，你的编程之路会越走越顺！
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  3. 缓存信息 : 0 reads,0 writes
  4. 会话信息 : SESSION_ID=1136df16b0e8e2c75b5875ca93453f8e
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  138. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-template/src/template/contract/DriverInterface.php ( 0.86 KB )
  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:0.000468s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000736s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000300s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000294s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000496s ]
  6. SELECT * FROM `set` [ RunTime:0.000181s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000599s ]
  8. SELECT * FROM `article` WHERE `id` = 476619 LIMIT 1 [ RunTime:0.000379s ]
  9. UPDATE `article` SET `lasttime` = 1772260628 WHERE `id` = 476619 [ RunTime:0.004949s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000249s ]
  11. SELECT * FROM `article` WHERE `id` < 476619 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000455s ]
  12. SELECT * FROM `article` WHERE `id` > 476619 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000567s ]
  13. SELECT * FROM `article` WHERE `id` < 476619 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000679s ]
  14. SELECT * FROM `article` WHERE `id` < 476619 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001466s ]
  15. SELECT * FROM `article` WHERE `id` < 476619 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002996s ]
0.084205s