(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 a lightweight framework for Python to implement API interface, and echarts is a very powerful front-end statistical chart library. This course covers the implementation of data persistence and visualization using Python + MYSQL, the application of version control system, the use of Linux server, and the separation of front and back-end development technology. It is a set of python with great practical value. Data visualization tutorial.)