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Python 不定长参数 | 一看就会

  • 2026-08-19 09:35:01
Python 不定长参数 | 一看就会

Python 不定长参数 | 一看就会

写函数时参数个数不固定，咋办？用args，就像拿个购物袋，往里塞多少都行，不用提前说装几个。比如 def 买菜 (菜名)，调用时买菜 (西红柿，鸡蛋，葱)，全收。
带名字的参数用kwargs，像贴标签的收纳柜，每个东西有名有姓。两个一起用记住：先 * args 后kwargs，顺序不能反，就像先装散货再贴标签。

#Python#Python 入门 #Python 教程 #编程入门 #自学 Python #Python 函数 #args #kwargs #编程笔记 #程序员日常

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      1. CONNECT:[ UseTime:0.001072s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
      2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001428s ]
      3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.009681s ]
      4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.003456s ]
      5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001367s ]
      6. SELECT * FROM `set` [ RunTime:0.015799s ]
      7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001475s ]
      8. SELECT * FROM `article` WHERE `id` = 511168 LIMIT 1 [ RunTime:0.004562s ]
      9. UPDATE `article` SET `lasttime` = 1787294032 WHERE `id` = 511168 [ RunTime:0.028378s ]
      10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.010095s ]
      11. SELECT * FROM `article` WHERE `id` < 511168 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.015463s ]
      12. SELECT * FROM `article` WHERE `id` > 511168 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.019929s ]
      13. SELECT * FROM `article` WHERE `id` < 511168 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002708s ]
      14. SELECT * FROM `article` WHERE `id` < 511168 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.016403s ]
      15. SELECT * FROM `article` WHERE `id` < 511168 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001722s ]
      0.300390s