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Python 函数必备参数|搞懂位置传参不报错

  • 2026-08-18 23:11:56
Python 函数必备参数|搞懂位置传参不报错

Python 函数必备参数｜搞懂位置传参不报错

学 Python 函数，必备参数很容易踩坑
很多报错，都是必备参数传参出错导致。

什么是必备参数：定义函数时，没有设置默认值的形参。
调用的时候，必须传入实参，一个都不能少。

两个核心规则：
1、传入参数数量要和形参数量匹配
2、位置要一一对应，顺序不能乱

搭配矩形面积小案例，一看就明白。
少传、多传、顺序写反，程序直接报错。
零基础小伙伴，收藏巩固基础，写代码少踩坑

#Python #Python 零基础 #Python 函数 #必备参数 #Python 学习笔记 #编程入门 #自学 Python #Python 基础 #代码学习 #Python 语法

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      140. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
      1. CONNECT:[ UseTime:0.000938s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
      2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001453s ]
      3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000657s ]
      4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000578s ]
      5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001198s ]
      6. SELECT * FROM `set` [ RunTime:0.000514s ]
      7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001404s ]
      8. SELECT * FROM `article` WHERE `id` = 509888 LIMIT 1 [ RunTime:0.026210s ]
      9. UPDATE `article` SET `lasttime` = 1787298056 WHERE `id` = 509888 [ RunTime:0.002164s ]
      10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.001995s ]
      11. SELECT * FROM `article` WHERE `id` < 509888 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001324s ]
      12. SELECT * FROM `article` WHERE `id` > 509888 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.014411s ]
      13. SELECT * FROM `article` WHERE `id` < 509888 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002463s ]
      14. SELECT * FROM `article` WHERE `id` < 509888 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004092s ]
      15. SELECT * FROM `article` WHERE `id` < 509888 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.116340s ]
      0.347717s