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Python 初学必备!知识点一览,轻松掌握

  • 2026-02-28 05:07:19
Python 初学必备!知识点一览,轻松掌握

Python 初学必备!知识点一览,轻松掌握

别再被复杂的教程劝退啦!这篇超全干货整理,带你无痛入门Python,小白也能弯道超车~

🌟 一、基础知识:先打好地基!
1⃣ 输入输出:用print()输出结果,input()获取用户输入,从此和程序对话~
2⃣ 变量:像贴标签一样存数据,比如name = "小美",灵活调用超方便!
3⃣ 数据类型:数字、字符串、布尔值…分清楚才能少报错💡
4⃣ 表达式 & 运算符:+ - * /加减乘除,== > <逻辑判断,基础但超重要!

🌈 二、流程控制:让程序“聪明”起来!
1⃣ 条件分支:用if-elif-else做选择题,比如“今天下雨吗?带伞!”☔
2⃣ 循环:for循环遍历数据,while循环反复执行,告别重复代码!

📦 三、数据结构:四大天王必须拿下!
1⃣ 列表(List):
创建:shopping = ["奶茶", "蛋糕"]
增删改查:.append()加元素,del删元素,灵活得像购物车🛒
2⃣ 元组(Tuple):和列表类似,但一旦创建不能改,适合存固定数据🔒
3⃣ 字符串(String):切片、拼接、格式化输出(f"你好,{name}"),玩转文字处理!
4⃣ 字典(Dict):用键值对存数据,比如user = {"name": "小明", "age": 18},查信息超快🔍

🛠 四、函数:代码复用神器!
1⃣ 定义函数:def say_hello():,从此一键调用复杂操作~
2⃣ 参数传递:位置参数、默认参数、可变参数…灵活适应不同场景!
3⃣ lambda表达式:匿名函数简化代码,比如lambda x: x*2,一行搞定计算✌
4⃣ 闭包 & 作用域:进阶玩法,让函数“记住”外部变量,解锁高阶技巧!

💬 小白避坑指南
✅ 多写多练!从猜数字游戏、简易计算器开始,边玩边学~
✅ 善用print()调试,哪里不对点哪里!
✅ 遇到报错别慌,读懂错误信息就是进步的开始!

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2、后台回复:学习
#Python #Python编程 #Python入门学习 #数据分析 #数据分析师 #数据分析求职 #计算机 #转行 #数据分析我在行

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  1. CONNECT:[ UseTime:0.000457s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000677s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000294s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000281s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000610s ]
  6. SELECT * FROM `set` [ RunTime:0.009952s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000698s ]
  8. SELECT * FROM `article` WHERE `id` = 476402 LIMIT 1 [ RunTime:0.007289s ]
  9. UPDATE `article` SET `lasttime` = 1772260235 WHERE `id` = 476402 [ RunTime:0.016595s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.001836s ]
  11. SELECT * FROM `article` WHERE `id` < 476402 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.005433s ]
  12. SELECT * FROM `article` WHERE `id` > 476402 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.008072s ]
  13. SELECT * FROM `article` WHERE `id` < 476402 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000802s ]
  14. SELECT * FROM `article` WHERE `id` < 476402 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.010661s ]
  15. SELECT * FROM `article` WHERE `id` < 476402 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000961s ]
0.135531s