python 知识点汇总 (持续更新中)

Author：友儿
发布时间：September 21, 2022
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Categories： Python

1.python 基础知识

python 变量与数据类型(1.0)

变量和赋值什么是变量一个实体的指代查看变量的内存地址id(x)可重新赋值为变量赋值通过=来赋值x = 3被重新赋值...

python 函数、运算符以及运算符优先级(2.1)

Python函数的基本介绍什么是函数?函数是一段可以直接被另外一段程序或代码引用的程序或代码, 也叫做子程序, 方...

python 字符串(字符序列)和字节序列(2.2)

字符串(字符序列)和字节序列字符由于历史原因, 将字符定义为unicode字符还不够准确, 但是未来字符的定义一定...

python 四大基础数据结构()及操作(2.3)

了解变量和引用变量简单地说就是指向了一个实体引用简单地说就是指向变量的变量>>> a = 1 &...

python 流程、循环、异常、函数的高级用法(3.0)

Python的逻辑控制语句条件判断语句ifelifelsea = 50 if a > 100: pr...

python 内置、匿名、高阶、递归等函数(3.1)

重新认识函数内置函数认识Python自带的, 可全局调用的函数, 避免我们命名冲突导致了函数性状发生改变查看Pyt...

python 作用域、闭包、装饰器(3.2)

作用域程序创建, 访问, 改变一个变量时, 都是在一个保存该变量的空间内进行, 这个空间被称为命名空间, 即作用域...

2.python 进阶知识

python 模块、time、datetime 导入使用(4.0)

导入第三方模块导包的层级关系模块(module)以文件为载体, 包含各类对象包(package)以文件夹为载体, ...

python 类的创建, 实例化, 初始化以及面向对象(4.1)

类的创建, 实例化, 初始化什么是类类就是拥有相同功能或者相同属性的对象集合类的创建object是所有类的基类cl...

python 类属性和实例属性、类方法, 静态方法, 实例方法、接口, 协议和抽象基类 (4.2)

类属性和实例属性类属性通过类对象可以直接访问的属性抽象概念的固有属性, 要考虑当前抽象概念的普适性# 贴标签不是一...

python的requests模块的介绍、多线程和多进程(5.0)

requests模块的介绍requests的作用通过python来模拟请求网址一个模拟请求由以下四个部分组成url...

python 进程间通信(IPC)(5.1)

进程间通信(IPC)文件通过读写文件来进行变量, 数据, 信息的传递读写冲突两个进程同时进行写, 或者一个写一个读...

python 迭代器和生成器(5.2)

迭代器和生成器迭代器概念上: 迭代器可以用来表示一个数据流, 提供了数据的惰性返回功能(只有我们主动去使用next...

3.python TCP-IP协议相关与抓包

输入网址后发生了什么? TCP/IP五层协议?

输入网址后发生了什么输入url统一资源定位器uniform resource locatorurl组成https:...

理解TCP/IP协议、三次握手、四次挥手、HTTPS

理解TCP/IP协议什么是TCP/IP协议TCP/IP并不是单个协议, 而是指一组协议的集合, 所以TCP/IP也...

抓包、模拟请求

抓包抓包其实就是中间人攻击, 只是我们会主动信任像fiddler这样的代理软件.对于服务端, 它伪装成客户端. 对...

4.python 数据库相关

数据库的基本介绍

数据库的基本介绍关系型数据库创建在关系模型基础上的数据库, 用来存储和管理结构化的数据.关系模型类似python中...

mysql 常用的数据类型

常用的数据类型int数字范围-2**32 ~ 2**32-1bigint数字范围-2**63 ~ 2 ** 63-...

mysql CRUD操作

创建表的时候尽量加上create_time字段, 为create_time设置默认值CURRENT_TIMESTA...

Mysql约束、分组查询

tip: 通过 desc 表名命令查看当前表信息tip2: as 关键字可以为我们的字段或者表取别名Mysql约束...

mysql变量声明、存储过程、触发器

变量声明服务器系统变量通过@@来调用系统变量# 列出mysql所有系统变量 SHOW VARIABLES SELE...

用python连接数据库、索引、优化、事务

用python的pymysql包连接数据库pymysqlpip install pymysql #如果让你装vs...

5.python 前端基础知识与爬虫相关

一个请求的组成、静态页面和动态页面、HTML, CSS和JS、浏览器渲染的过程

一个请求的组成def request_jd(keyword): url = "https://s...

了解元素定位css-selector 、Python库BeautifulSoup 等

css-selector尽量避免解析路径中包含位置信息chrome页面中内置了Jquery环境, 用$符号来表示直...

一个小又全的爬虫项目包含哪些部分

一个小又全的爬虫项目任务生成者生成爬虫任务的组件, 最大的作用就是建立生产消费者模型, 将生产者和消费者剥离, 可...

6.python Scrapy框架相关

python 路径管理以及常见报错

路径管理路径绝对路径总是从根目录开始H:\PyCharmProjects\tutorials_2\jd_crawl...

Scrapy爬虫框架介绍

Scrapy爬虫框架介绍文档英文文档中文文档什么是scrapy基于twisted搭建的异步爬虫框架.scrapy爬...

Scrapy的启动和debug、 Item、设置、中间件

Scrapy的启动和debug命令行scrapy crawl jd_search启动脚本# 新建run.py f...

Scrapy的Meta、异常处理

Meta信息传递在创建REQEUSTS对象时设置metayield scrapy.FormRequest(meta...

redis介绍、安装以及数据类型

redis简单介绍https://redis.io/什么是redis?remote dictionary serv...

python 分布式爬虫

分布式爬虫什么分布式分布式就是把一个系统拆分成若干个子系统, 每个子系统独立运行, 然后通过某种方式进行交互.什么...

Selenium 简单介绍、安装、启动

Selenium简单介绍https://selenium-python.readthedocs.io/ https...

7.python Django 框架相关

8.python 服务器与项目部署

9.python JavaScript相关

10.python JS加密相关

11.python 数据结构与常用算法

12.python 面试内容

13.python 爬虫进阶

Last modification：February 20, 2024

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python 知识点汇总 (持续更新中)

友儿 • 2022 年 09 月 21 日

<h2>1.python 基础知识</h2><p><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2855/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://niuzheng.net/usr/uploads/2020/11/1503187228.jpg);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">python 变量与数据类型(1.0)</p>
<div class="inster-summary text-muted">
变量和赋值什么是变量一个实体的指代查看变量的内存地址id(x)可重新赋值为变量赋值通过=来赋值x = 3被重新赋值...
</div>
</div>
</a>

</div>

</div><br><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2859/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://niuzheng.net/usr/uploads/2020/11/1503187228.jpg);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">python 函数、运算符以及运算符优先级(2.1)</p>
<div class="inster-summary text-muted">
Python函数的基本介绍什么是函数?函数是一段可以直接被另外一段程序或代码引用的程序或代码, 也叫做子程序, 方...
</div>
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</a>

</div>

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<a href="https://niuzheng.net/archives/2857/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://niuzheng.net/usr/uploads/2020/11/1503187228.jpg);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">python 字符串(字符序列)和字节序列(2.2)</p>
<div class="inster-summary text-muted">
字符串(字符序列)和字节序列字符由于历史原因, 将字符定义为unicode字符还不够准确, 但是未来字符的定义一定...
</div>
</div>
</a>

</div>

</div><br><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2858/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://niuzheng.net/usr/uploads/2020/11/1503187228.jpg);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">python 四大基础数据结构()及操作(2.3)</p>
<div class="inster-summary text-muted">
了解变量和引用变量简单地说就是指向了一个实体引用简单地说就是指向变量的变量&gt;&gt;&gt; a = 1
&...
</div>
</div>
</a>

</div>

</div><br><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2863/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://niuzheng.net/usr/uploads/2022/09/4596953.png);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">python 流程、循环、异常、函数的高级用法(3.0)</p>
<div class="inster-summary text-muted">
Python的逻辑控制语句条件判断语句ifelifelsea = 50
if a &gt; 100:
    pr...
</div>
</div>
</a>

</div>

</div><br><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2866/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://niuzheng.net/usr/uploads/2020/11/1503187228.jpg);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">python 内置、匿名、高阶、递归等函数(3.1)</p>
<div class="inster-summary text-muted">
重新认识函数内置函数认识Python自带的, 可全局调用的函数, 避免我们命名冲突导致了函数性状发生改变查看Pyt...
</div>
</div>
</a>

</div>

</div><br><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2869/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://niuzheng.net/usr/uploads/2020/11/1503187228.jpg);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">python 作用域、闭包、装饰器(3.2)</p>
<div class="inster-summary text-muted">
作用域程序创建, 访问, 改变一个变量时, 都是在一个保存该变量的空间内进行, 这个空间被称为命名空间, 即作用域...
</div>
</div>
</a>

</div>

</div></p><h2>2.python 进阶知识</h2><p><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2870/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://niuzheng.net/usr/uploads/2020/11/1503187228.jpg);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">python 模块、time、datetime 导入使用(4.0)</p>
<div class="inster-summary text-muted">
导入第三方模块导包的层级关系模块(module)以文件为载体, 包含各类对象包(package)以文件夹为载体, ...
</div>
</div>
</a>

</div>

</div><br><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2871/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://niuzheng.net/usr/uploads/2020/11/1503187228.jpg);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">python 类的创建, 实例化, 初始化以及面向对象(4.1)</p>
<div class="inster-summary text-muted">
类的创建, 实例化, 初始化什么是类类就是拥有相同功能或者相同属性的对象集合类的创建object是所有类的基类cl...
</div>
</div>
</a>

</div>

</div><br><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2872/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://niuzheng.net/usr/uploads/2020/11/1503187228.jpg);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">python 类属性和实例属性、类方法, 静态方法, 实例方法、接口, 协议和抽象基类 (4.2)</p>
<div class="inster-summary text-muted">
类属性和实例属性类属性通过类对象可以直接访问的属性抽象概念的固有属性, 要考虑当前抽象概念的普适性# 贴标签不是一...
</div>
</div>
</a>

</div>

</div><br><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2899/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://niuzheng.net/usr/uploads/2022/09/2735417576.png);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">python的requests模块的介绍、多线程和多进程(5.0)</p>
<div class="inster-summary text-muted">
requests模块的介绍requests的作用通过python来模拟请求网址一个模拟请求由以下四个部分组成url...
</div>
</div>
</a>

</div>

</div><br><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2901/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://niuzheng.net/usr/uploads/2022/09/3282766271.png);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">python 进程间通信(IPC)(5.1)</p>
<div class="inster-summary text-muted">
进程间通信(IPC)文件通过读写文件来进行变量, 数据, 信息的传递读写冲突两个进程同时进行写, 或者一个写一个读...
</div>
</div>
</a>

</div>

</div><br><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2905/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://niuzheng.net/usr/uploads/2022/09/2955780241.png);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">python 迭代器和生成器(5.2)</p>
<div class="inster-summary text-muted">
迭代器和生成器迭代器概念上: 迭代器可以用来表示一个数据流, 提供了数据的惰性返回功能(只有我们主动去使用next...
</div>
</div>
</a>

</div>

</div></p><h2>3.python TCP-IP协议相关与抓包</h2><p><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2911/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://niuzheng.net/usr/uploads/2022/09/1289146006.png);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">输入网址后发生了什么? TCP/IP五层协议?</p>
<div class="inster-summary text-muted">
输入网址后发生了什么输入url统一资源定位器uniform resource locatorurl组成https:...
</div>
</div>
</a>

</div>

</div><br><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2917/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://niuzheng.net/usr/uploads/2022/09/4140455886.png);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">理解TCP/IP协议、三次握手、四次挥手、HTTPS</p>
<div class="inster-summary text-muted">
理解TCP/IP协议什么是TCP/IP协议TCP/IP并不是单个协议, 而是指一组协议的集合, 所以TCP/IP也...
</div>
</div>
</a>

</div>

</div><br><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2921/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://niuzheng.net/usr/uploads/2022/09/3005770225.png);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">抓包、模拟请求</p>
<div class="inster-summary text-muted">
抓包抓包其实就是中间人攻击, 只是我们会主动信任像fiddler这样的代理软件.对于服务端, 它伪装成客户端. 对...
</div>
</div>
</a>

</div>

</div></p><h2>4.python 数据库相关</h2><p><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2928/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://niuzheng.net/usr/uploads/2022/09/3290878150.jpg);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">数据库的基本介绍</p>
<div class="inster-summary text-muted">
数据库的基本介绍关系型数据库创建在关系模型基础上的数据库, 用来存储和管理结构化的数据.关系模型类似python中...
</div>
</div>
</a>

</div>

</div><br><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2932/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://images.niuzheng.net/usr/uploads/2024/02/250821758.jpeg);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">mysql 常用的数据类型</p>
<div class="inster-summary text-muted">
常用的数据类型int数字范围-2**32 ~ 2**32-1bigint数字范围-2**63 ~ 2 ** 63-...
</div>
</div>
</a>

</div>

</div><br><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2933/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://niuzheng.net/usr/uploads/2022/09/265978915.png);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title">mysql CRUD操作</p>
<div class="inster-summary text-muted">
创建表的时候尽量加上create_time字段, 为create_time设置默认值CURRENT_TIMESTA...
</div>
</div>
</a>

</div>

</div><br><div class="preview">
<div class="post-inser post box-shadow-wrap-normal">
<a href="https://niuzheng.net/archives/2939/" target="_blank" class="post_inser_a no-external-link no-underline-link">
<div class="inner-image bg" style="background-image: url(https://images.niuzheng.net/usr/uploads/2024/02/250821758.jpeg);background-size: cover;"></div>

<div class="inner-content" >
<p class="inser-title"> Mysql约束、分组查询</p>
<div class="inster-summary text-muted">
tip: 通过 desc 表名命令查看当前表信息tip2: as 关键字可以为我们的字段或者表取别名Mysql约束...
</div>
</div>
</a>

</div>

</div><br><div class="preview">
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python 知识点汇总 (持续更新中)

1.python 基础知识

2.python 进阶知识

3.python TCP-IP协议相关与抓包

4.python 数据库相关

5.python 前端基础知识与爬虫相关

6.python Scrapy框架相关

7.python Django 框架相关

8.python 服务器与项目部署

9.python JavaScript相关

10.python JS加密相关

11.python 数据结构与常用算法

12.python 面试内容

13.python 爬虫进阶

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