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别盲目啃Python!新手必吃透的核心知识点全梳理

  • 2026-06-28 12:55:28
别盲目啃Python!新手必吃透的核心知识点全梳理
很多初学者踩了只看视频不抓重点的坑，基础没打牢，往后爬虫、数据分析寸步难行。
首先是变量与基础数据类型，Python无需提前定义类型，直接赋值即可。常用四大基础类型：整数int、浮点数float、字符串str、布尔bool；容器类型是学习重点，列表list可增删改查，字典dict靠键值对快速存数据，元组tuple不可修改，日常自动化、数据处理高频用到。  
其次是流程控制，if判断、for/while循环是代码逻辑骨架。新手容易忽略缩进规范，Python依靠缩进区分代码块，空格错乱会直接报错；搭配and/or/not逻辑运算符，就能实现大部分条件筛选需求。  函数是简化重复代码的关键，学会def自定义函数、参数传递，能大幅减少冗余代码。基础阶段不用深究高阶装饰器，先掌握基础调用、返回值即可。  最后简单提应用方向，Python适配自动化办公、数据处理、AI、爬虫多领域，基础学完可从小工具练手，比如批量整理表格、自动读取文件，实操才能巩固知识点。  学习Python切忌贪多求快，先把以上基础吃透，再进阶第三方库。
坚持多敲代码、主动排错，很快就能独立写出实用小程序#Python#编程#计算机
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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:0.000523s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000567s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.100669s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.089471s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000620s ]
  6. SELECT * FROM `set` [ RunTime:0.004022s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000659s ]
  8. SELECT * FROM `article` WHERE `id` = 501552 LIMIT 1 [ RunTime:0.056536s ]
  9. UPDATE `article` SET `lasttime` = 1783005925 WHERE `id` = 501552 [ RunTime:0.024821s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.010023s ]
  11. SELECT * FROM `article` WHERE `id` < 501552 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.050806s ]
  12. SELECT * FROM `article` WHERE `id` > 501552 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.020074s ]
  13. SELECT * FROM `article` WHERE `id` < 501552 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.369600s ]
  14. SELECT * FROM `article` WHERE `id` < 501552 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.272704s ]
  15. SELECT * FROM `article` WHERE `id` < 501552 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.081730s ]
1.158799s