The command fastapi dev reads your main.py file, detects the FastAPI app in it, and starts a server using Uvicorn. By default, fastapi dev will start with auto-reload enabled for local development.

This tutorial shows you how to use FastAPI with most of its features, step by step. Each section gradually builds on the previous ones, but it's structured to separate topics, so that you can go …

Here are the introductory sections and the tutorials to learn FastAPI. You could consider this a book, a course, the official and recommended way to learn FastAPI. 😎

FastAPI includes an extremely easy to use, but extremely powerful Dependency Injection system. Even dependencies can have dependencies, creating a hierarchy or "graph" of dependencies.

Here's the reference or code API, the classes, functions, parameters, attributes, and all the FastAPI parts you can use in your applications. If you want to learn FastAPI you are much better off reading …

FastAPI Reference FastAPI class Here's the reference information for the FastAPI class, with all its parameters, attributes and methods. You can import the FastAPI class directly from fastapi:

But once you know the basic information of HTTPS for developers you can easily combine and configure different tools to help you manage everything in a simple way. In some of the next chapters, I'll show …

The command line program called fastapi is FastAPI CLI. FastAPI CLI takes the path to your Python program (e.g. main.py) and automatically detects the FastAPI instance (commonly named app), …

FastAPI framework, high performance, easy to learn, fast to code, ready for production

The main Tutorial - User Guide should be enough to give you a tour through all the main features of FastAPI. In the next sections you will see other options, configurations, and additional features.