This segment details the crucial steps of importing the FastAPI library, creating an instance, defining a path operation (a basic API endpoint), and automatically formatting the code using autopep8. It also covers starting the web server using uvicorn, highlighting the importance of using the correct file and instance names, and verifying the successful setup by checking the returned message from the API endpoint in a web browser. Set up FastAPI: Install `fastapi[all]` via pip. Follow FastAPI tutorial to create a project. Import `fastapi`, create an app instance, and define a path operation. Run the server using `uvicorn main:app`. Verify functionality by accessing the generated URL (localhost:8000).