(Python is currently the most popular programming language, MySQL is a very popular relational database product in the world, Linux is the most widely used server operating system, Git is a distributed version control system widely used by enterprises, Flask is an API interface implemented by Python A lightweight framework, ECharts is a very powerful front-end statistical charting library. This course covers the use of Python+MySQL to achieve data persistence and visualization, including the application of version control systems, the use of Linux servers, and front-end and back-end separation development technologies. It is a set of Python with great practical value. Data visualization tutorial.)