Add support for python 3.9

[mlech-reef]

Python 3.9 has been released two days ago.

[humitos]

Hi @mlech-reef! This is in our radar (in fact our image 8.0 already have Py3.9rc installed on it). However, it's not published and ready to be used by users yet. I don't have an ETA for this unfortunately.

[mlech-reef]

Thank you for the update. I will switch to 3.8 for now

[ThiefMaster]

Unfortunately using 3.8 doesn't work when you enable pip-installing and have python_requires set in your package's metadata... :/

ERROR: Package 'indico' requires a different Python: 3.8.6 not in '~=3.9'

[ThiefMaster]

OK, for now I found a workaround to build with 3.8: indico/indico@a3c2eb4

Wouldn't work with a setup.cfg though (which I'd like to start using at some point), so still hoping to get proper 3.9 support soon :)

[ThiefMaster]

Bump, any news?

[pradyunsg]

Ahoy! Anything that can be done to help move this forward?

[ThiefMaster]

build:
  image: testing

in .readthedocs.yml helps

[pradyunsg]

From the README here:

readthedocs/build:8.0

testing Ubuntu 20.04 supporting Python 2.7, 3.5, 3.6, 3.7, 3.8, 3.9.0rc1 and PyPy3.5-7.0.0. For internal development testing only, not available for public usage yet.

[ThiefMaster]

It works. Probably the readme is outdated...

See this comment from a RTD member as well: readthedocs/readthedocs.org#7554 (comment)

[staticdev]

@humitos is there a circular dependency here? readthedocs-docker-images is waiting for readthedocs.org to update and vice-versa?

[humitos]

@staticdev if you need Python 3.9, you can use testing image for now.

We are discussing the new structure for our Docker images at readthedocs/readthedocs.org#7566. However, it will take some time to be implemented and ready to use.

[rjplevin]

I'm astounded that this is still a problem in 2023. Python 3.11 is out and 3.12 in alpha, but RTD is still not supporting 3.9 or later?

[classabbyamp]

yes it does

[rjplevin]

Thanks. I see now that the syntax in my yml file has been designated "legacy".