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【Python学习】第3期:基础语法—注释

  • 2026-08-21 04:14:07
【Python学习】第3期:基础语法—注释
个人学习，仅供参考。
注释：是用自己能看懂的通俗语言，给代码做标注说明，就像给代码写“备注”。能够增强代码的可读性，让你和别人能快速明白代码的用途和逻辑。
★注释不会被程序执行，仅用于提供说明和解释，以增强代码的可读性和可维护性。
分类：单行注释和多行注释
单行注释（常用）
  • 作用：给一行代码做说明，或临时禁用这行代码。
  • 语法：用#开头，再写说明文字
  1. 为了保证代码的可读性和规范性，#号后面建议先添加一个空格，再编写相应的文字说明。
  2. 注释放在代码后，注释和代码之间至少要有两个空格，保证代码的规范性。
  • 两种写法：
  1. 注释单独一行
  2. 注释跟在代码后面
多行注释
  • 作用：给一段代码、一个功能（如函数、类）或整个文件写详细说明，或临时禁用多行代码。
  • 适用场景：
  1. 注释内容太长，一行写不下。
  2. 想给整个函数、文件等整体说明。
  • 语法：用三组英文双引号"""或三组英文单引号'''包裹注释内容。
添加注释的情况
  1. 不用多：简单到一看就懂的代码，不用加注释
  2. 必须加：逻辑绕、步骤多，或实现关键功能（比如计算公式、判断条件等）的代码
★写注释时尽量用简单直白的语言，不用复杂术语。
批量注释/取消注释
  • 操作：选中要处理的多行代码，按住快捷键Ctrl+/
  • 效果：一键给出选中代码加单行注释，再按一次就取消注释，调试时方便。
知识
Ctrl+D：快速复制到下一行
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  137. /yingpanguazai/ssd/ssd1/www/f.mffb.com.cn/vendor/topthink/think-template/src/template/driver/File.php ( 2.41 KB )
  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:0.000377s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000571s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000936s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000257s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000470s ]
  6. SELECT * FROM `set` [ RunTime:0.000193s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000511s ]
  8. SELECT * FROM `article` WHERE `id` = 504702 LIMIT 1 [ RunTime:0.011031s ]
  9. UPDATE `article` SET `lasttime` = 1787309456 WHERE `id` = 504702 [ RunTime:0.012251s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000255s ]
  11. SELECT * FROM `article` WHERE `id` < 504702 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000461s ]
  12. SELECT * FROM `article` WHERE `id` > 504702 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000505s ]
  13. SELECT * FROM `article` WHERE `id` < 504702 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.004487s ]
  14. SELECT * FROM `article` WHERE `id` < 504702 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.022432s ]
  15. SELECT * FROM `article` WHERE `id` < 504702 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.078388s ]
0.201206s