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python介绍和安装(1)

  • 2026-06-30 04:49:45
python介绍和安装(1)

01

python介绍和安装

一、python介绍

1、python是一门编程语言

2、pyton是一个面向对象,解释性的动态类型的语言,guido  van  rossunm  (吉多*范罗姆),在1989年发明,第一个公开发行的版本1991年;

guido  van  rossunm  (吉多*范罗姆  )是荷兰   计算机程序员

a、面向对象:python中一切皆为对象,对事物的描述和方法系统的定义为一个类,在这个类中的具体的实例,我们就说对象。

例如:人  类==mlj   具体的对象

b、解释性:

python执行时无序先进行二进制代码,在编译;直接在执行的过程中对语句进行编译。

例如:java语言,安装jdk编译,python不需要,直接编译

c、动态类型:

python在运行时可以改变其结构,新的函数可以被引进,已有函数可以被删除

3、python是一个"胶水语言"

4、python 有哪些特点?

a、简单

b、易学

c、免费开源

d、可拓展性强

e、可移植性强

f、具有丰富的第三方类和库

5、python应用在哪些领域?

网页开发、ai人工只能、大数据、爬虫、数据分析、自动化脚本开发、可视化界面开发、云计算等

6、python的版本

a、python 2.0 版本    

b、python目前3.0的版本,

c、最新版本3.14

7、python的打印方式

print ()

8、python实际应用

豆瓣、知乎

9、python使用人员

a、python开发人员

b、测试人员

c、运维

二、python安装

1、https://www.python.org/downloads/  

python官网,下载安装包

2、python版本3.14.4 最新版本,我们目前学习的Python版本3.11以上

备注:一般讲课工作中使用,会使用低一点版本

3、python有windown系统,mocos系统,32位、64位

4、点击安装包,进行安装

新建一个安装文件:

点击python.exe 文件进行安装

5、选择自定义安装,点击下一步,在选择已经新建好的python文件夹中,点击install

6、等待安装完成,关闭,

(1)查看新建的文件夹

(2)在dos命令输入

win+r  ==》输入cmd==》敲回车

7、检查python是否安装成功:运行命令中输入cmd,dos命令下输入python

正确的显示:

错误的的python显示:

8、环境变量配置

(1)电脑==右键==属性

(2)高级系统设置

(3)环境变量

(4)查看系统变量

(5)找到path

(6)path中添加

a、python安装路径

如:E:\python1

b、python下的Scripts路径

如:E:\python1\Scripts

 点击新建==》输入路径==添加成功==点击“确定”

以上就是python安装成功;

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  1. CONNECT:[ UseTime:0.000661s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000958s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000329s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000285s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000618s ]
  6. SELECT * FROM `set` [ RunTime:0.000231s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000687s ]
  8. SELECT * FROM `article` WHERE `id` = 491828 LIMIT 1 [ RunTime:0.000488s ]
  9. UPDATE `article` SET `lasttime` = 1783108112 WHERE `id` = 491828 [ RunTime:0.013663s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.007246s ]
  11. SELECT * FROM `article` WHERE `id` < 491828 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.005222s ]
  12. SELECT * FROM `article` WHERE `id` > 491828 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001968s ]
  13. SELECT * FROM `article` WHERE `id` < 491828 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001673s ]
  14. SELECT * FROM `article` WHERE `id` < 491828 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001341s ]
  15. SELECT * FROM `article` WHERE `id` < 491828 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001345s ]
0.104473s