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Python 运算符|搞懂加减对比逻辑

  • 2026-08-18 23:12:09
Python 运算符|搞懂加减对比逻辑

Python 运算符｜搞懂加减对比逻辑

写代码离不开运算符:

分为算术、比较、逻辑三大类。
算术运算符：加减乘除、取余、取整，用来算数字
比较运算符：做大小对比，结果只有 True 或者 False
逻辑运算符：and、or、not，处理多个条件

重点踩坑：判断相等一定要写==，单个=是赋值。
搭配 if 判断一起使用，是 Python 基础核心，新手收藏巩固。

#Python #Python 零基础 #Python 运算符 #Python 学习笔记 #编程入门 #自学 Python #Python 基础语法 #小白学编程 #代码学习 #Python 基础

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      1. CONNECT:[ UseTime:0.000961s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
      2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001474s ]
      3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000677s ]
      4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000676s ]
      5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001371s ]
      6. SELECT * FROM `set` [ RunTime:0.000617s ]
      7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001426s ]
      8. SELECT * FROM `article` WHERE `id` = 510644 LIMIT 1 [ RunTime:0.037575s ]
      9. UPDATE `article` SET `lasttime` = 1787298586 WHERE `id` = 510644 [ RunTime:0.002692s ]
      10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000705s ]
      11. SELECT * FROM `article` WHERE `id` < 510644 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001095s ]
      12. SELECT * FROM `article` WHERE `id` > 510644 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.026184s ]
      13. SELECT * FROM `article` WHERE `id` < 510644 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.032039s ]
      14. SELECT * FROM `article` WHERE `id` < 510644 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.023416s ]
      15. SELECT * FROM `article` WHERE `id` < 510644 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.042003s ]
      0.367288s