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学习人工智能第一步:python基础编程(小白第一步)

  • 2026-08-21 08:09:59
学习人工智能第一步:python基础编程(小白第一步)

▲ 图片来源于网络

今天,咱们正式开启人工智能入门第一课,跟着小魔女一同踏上 Python 编程学习之路。

最先要搞懂的核心问题:Python 究竟是什么?

Python 属于一款免费开源、支持多系统运行、动态类型且完全面向对象的程序开发语言。

为何优先选择学习 Python?

Python 是踏入 AI 领域必不可少的入门语言,类比来说,Python 就相当于搭建人工智能大厦的地基,想要构建功能完善的 AI 项目,扎实的底层基础缺一不可。

▲ 图片来源于网络

一、Python环境搭建

学习python语言的前置准备

上手编程前的必备准备工作

想要编写并运行 Python 代码,第一步要在本地电脑配置好专属运行环境,没有环境就无法执行代码,这和学车前必须准备好车辆是同一个道理。

所需配套软件:Anaconda(负责各类工具包统一管理)搭配 PyCharm 编辑器,完成软件安装后还要配置对应 Python 解释器。大家可以前往百度、CSDN(国内规模最大的程序员专业交流平台)查找完整安装包与分步配置教程。

如果搞不定,或者需要相关安装包教程,可点击下方小卡片回复“888”

▲ 图片来源于网络

二、Python基础-变量

变量操作数据

在学习python变量之前我们先思考以下4个问题。

程序

▲ 图片来源于网络

我们可以将电脑的内存空间想象成一座大型仓储库房,各类数据就是库房里存放的货品,变量则是贴在货品表面的分类标签,依靠标签就能快速调取对应货品。

库房里不允许存放无标识的货品,只要我们需要临时保存数字、文本、数组、字典等各类信息,都要借助变量来完成存储。

1

变量的定义

用来绑定数据对象的标识名称,相当于指向内存中数据的专属代号。

2

变量命名

  • 名称首位只能是英文字母或下划线,后续字符可搭配字母、数字、下划线;
  • 禁止使用 Python 内置专用关键词,例如 if、else、None 等,违规命名会直接触发程序报错;
  • 推荐命名规范:全部使用小写字母,多个单词组合时用下划线分隔。

3

变量的语法及内存图

基础赋值写法:变量名 = 数值 / 文本

多变量同值赋值:变量名 1 = 变量名 2 = 同一组数据

多变量分别赋值:变量名 1, 变量名 2, … = 数据 1, 数据 2, …

a = 1a = b = 1a, b = 1, 2

变量本身并不会直接保存完整数据,只记录数据在内存中的存储地址。可以用放风筝举例:真实数据是空中风筝,变量就是手中牵引风筝的线。

当变量和对应数据解绑,且没有其他任何变量绑定该数据时,数据的引用计数归零,系统会自动清除这份闲置数据。好比松开手中风筝线,同时没有其他绳索牵引,风筝便会随风消失。

4

变量的特性

(1)可重复调用

定义完成的变量能够反复调用,多次对同一组数据做运算,大幅提升代码简洁度与可读性。

不使用变量的写法:

print (10 + 5)

print (10 * 5)

使用变量优化后:

a = 10

b = 5

print (a + b)

print (a * b)

(2)支持重新赋值

同一个变量能够多次赋予不同数值,以此调整程序运行状态,适配各类场景的动态变化。

a = 10

a = 5

print (a)

▲ 图片来源于网络

到这里,Python 变量相关基础内容就全部讲解完毕啦,本次分享到此结束,咱们下期接着学习更多内容~

资料获取方式:

1. 关注本公众号

2. 发送口令“学习”即可领取(人工回复可能存在轻微时差,大家无需着急,所有发送口令的同学都会收到资料)

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  1. CONNECT:[ UseTime:0.001203s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001875s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.002300s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.004658s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001611s ]
  6. SELECT * FROM `set` [ RunTime:0.001332s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001979s ]
  8. SELECT * FROM `article` WHERE `id` = 503978 LIMIT 1 [ RunTime:0.014980s ]
  9. UPDATE `article` SET `lasttime` = 1787314679 WHERE `id` = 503978 [ RunTime:0.009903s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000713s ]
  11. SELECT * FROM `article` WHERE `id` < 503978 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001553s ]
  12. SELECT * FROM `article` WHERE `id` > 503978 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001202s ]
  13. SELECT * FROM `article` WHERE `id` < 503978 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.017422s ]
  14. SELECT * FROM `article` WHERE `id` < 503978 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.005252s ]
  15. SELECT * FROM `article` WHERE `id` < 503978 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002750s ]
0.239656s