" If anyone is looking to build a production Python API, I would highly recommend FastAPI. It is beautifully designed, simple to use and highly scalable, it has become a key component in our API …

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

It streamlines the process of building, deploying, and accessing an API with minimal effort. It brings the same developer experience of building apps with FastAPI to deploying them to the cloud. 🎉

Just standard modern Python. If you need a 2 minute refresher of how to use Python types (even if you don't use FastAPI), check the short tutorial: Python Types.

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

In Python 3.6 and above (including Python 3.10) you can use the Union type from typing and put inside the square brackets the possible types to accept. In Python 3.10 there's also a new syntax where …

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 …

It's very common in Python packages to try the best to avoid breaking changes in new versions, but it's better to be safe, and install newer versions intentionally and when you can run the tests to check …

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

Again, just with that same Python type declaration, FastAPI gives you automatic, interactive documentation (integrating Swagger UI). Notice that the path parameter is declared to be an integer.