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别急着写代码!Python数据类型没搞懂,只会越学越容易乱 (附代码)

  • 2026-08-18 23:11:32
别急着写代码!Python数据类型没搞懂,只会越学越容易乱 (附代码)
你学Python是不是也和我一样被各种数据类型搞晕？
有时不是不会语法才出现很多报错，是因为数据类型没判断对。类型一错，后面的计算、筛选、拼接、分组都可能会出问题。

很多人刚学Python很多人就喜欢先学循环、函数和各种库，觉得写代码就会进步很快，等你真到处理数据环节，会发现问题都是出在最基础的地方。

学Python的话数据类型这块要早搞懂。今天带你一次性搞懂Python所有内置数据类型！内容不难，先理解每种类型适合干什么。

重点中的重点 
不可变类型：int/float/bool/str/tuple/frozenset - 可以做字典的键 
可变类型：list/dict/set - 不能做字典的键 
这个区别影响赋值行为和函数参数传递！可变对象传入函数会被修改。 
💡 学习建议 
类型转换用int()/float()/str()等，类型检查推荐isinstance()而不是type()，因为它支持继承关系。 
收藏这套笔记，Python基础稳了！每张图都配有代码示例，看完就能上手写代码！
#python#数据分析#代码#python数据类型##python语法
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  1. CONNECT:[ UseTime:0.001204s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001641s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000810s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000751s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001669s ]
  6. SELECT * FROM `set` [ RunTime:0.000607s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001804s ]
  8. SELECT * FROM `article` WHERE `id` = 507952 LIMIT 1 [ RunTime:0.002794s ]
  9. UPDATE `article` SET `lasttime` = 1787309422 WHERE `id` = 507952 [ RunTime:0.002247s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000729s ]
  11. SELECT * FROM `article` WHERE `id` < 507952 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001372s ]
  12. SELECT * FROM `article` WHERE `id` > 507952 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.003177s ]
  13. SELECT * FROM `article` WHERE `id` < 507952 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.044664s ]
  14. SELECT * FROM `article` WHERE `id` < 507952 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.031626s ]
  15. SELECT * FROM `article` WHERE `id` < 507952 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.070486s ]
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