at what stage is tox used

I am not sure if this the best place, but I am starting to get familiar with managing different python versions for an open source project, and I found that tox is a good tool to use. Now, I see there is a tox.ini in the root of this project, but I don’t see it used ever in CI (only looking into github actions).
in fact, I see that django/schedule_tests.yml at main · django/django · GitHub is used for testing different python versions, but tox is never used. what is the point of having tox if it’s not used in CI? is it maybe used somewhere else?

I believe it’s just for local convenience. I’ve not used it but perhaps the fellows do, or other regular contributors. You could check the file’s git history to see who maintains it.

I use it pretty regularly :person_raising_hand: