First check

• I added a very descriptive title to this issue.
• I used the GitHub search to find a similar issue and didn't find it.
• I searched the FastAPI documentation, with the integrated search.
• I already searched in Google "How to X in FastAPI" and didn't find any information.
• I already read and followed all the tutorial in the docs and didn't find an answer.
• After submitting this, I commit to:
  • Read open issues with questions until I find 2 issues where I can help someone and add a comment to help there.
  • Or, I already hit the "watch" button in this repository to receive notifications and I commit to help at least 2 people that ask questions in the future.
  • Implement a Pull Request for a confirmed bug.

Description

FastAPI officially declares support for python up to version 3.8. This holds true in pyproject.toml and in declaration of tested python versions.

At the same time, FastAPI installs on python 3.9 and works without problem.

The solution you would like

• Extend tests to include also python 3.9
• Declare support for python 3.9 in pyproject.toml, so that on https://pypi.org/project/fastapi/ it shows support for it.

Additional context

There are also docker images for FastAPI such as tiangolo/uvicorn-gunicorn-fastapi-docker which currently declare support up to python 3.8 and not for python 3.9.

Anyway, these things can go it's own upgrade path.