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50个Python 经典操作,必看的实战技巧开场白

  • 2026-02-27 00:18:23
50个Python 经典操作,必看的实战技巧开场白

  本文系统梳理Python编程中最常用的50个核心命令，涵盖数据类型操作、流程控制、函数与模块、文件处理等关键领域。通过代码示例与场景分析，帮助开发者快速掌握Python编程的核心技巧，提升开发效率。

1、字符串

2、列表

3、字典

4、集合

5、数学运算

6、文件操作

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  1. CONNECT:[ UseTime:0.000465s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000709s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000287s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.004071s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000590s ]
  6. SELECT * FROM `set` [ RunTime:0.000217s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000630s ]
  8. SELECT * FROM `article` WHERE `id` = 475887 LIMIT 1 [ RunTime:0.000499s ]
  9. UPDATE `article` SET `lasttime` = 1772240384 WHERE `id` = 475887 [ RunTime:0.015661s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000335s ]
  11. SELECT * FROM `article` WHERE `id` < 475887 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000489s ]
  12. SELECT * FROM `article` WHERE `id` > 475887 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000431s ]
  13. SELECT * FROM `article` WHERE `id` < 475887 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000790s ]
  14. SELECT * FROM `article` WHERE `id` < 475887 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000600s ]
  15. SELECT * FROM `article` WHERE `id` < 475887 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000842s ]
0.096099s