scrapy爬取招投标信息存入MySQL

说明：  Python黑帽子 黑客与渗透测试编程之道-[中文](Python black hat hacker and the way of penetration test programming - [Chinese])

说明：  聚焦爬虫的工作流程较为复杂，需要根据一定的网页分析算法过滤与主题无关的链接，保留有用的链接并将其放入等待抓取的URL队列。(The workflow of focusing on crawlers is more complicated, and it is necessary to filter the links irrelevant to the topic according to certain webpage analysis algorithms, retain useful links and put them into the queue of URLs waiting to be crawled.)

【实例简介】 完整的Python银行账户管理系统，包括新建账户、查询、更新、存款、转账、取款、注销 采用csv存储信息

说明：  python语言实现多项式秘密分享，并且可以用拉格朗日插值恢复(Python language implements polynomial secret sharing and can be restored by Lagrange interpolation)

说明：  python data science handbook

说明：  Python 3.8.2中文帮助文档PDF版，需要的下载(Python 3.8.2 Chinese help document PDF version, download required)

python入门教材，涵盖了python语言的基础教学，并包括三个联手项目（1，外星人入侵游戏 2，数据可视化 3，Web应用程序）(Python Introductory textbook)

说明：  Python code for DOA and microphone array 6 mic

说明：  能然黑夜的图片变成白天，效果很逼真，很牛(If the picture of night turns into day, the effect is very vivid and cattle.)

用于abaqus建模内聚力单元建模，通过内聚力单元分析材料损伤(Used for abaqus modeling, the cohesion unit is used to analyze material damage)