Many projects use tox for their tests.
Usually, they test with several Python versions.

As a newcomer to these projects, to testing, to tox, I have a hard time figuring out how to install different Python versions next to each other and how to use them with tox. As a result, I will probably only test the code with one Python version - the one installed.

As such, I would like to document how to actually add the Python versions which are required by the project and written down in the tox.ini file.
I wonder about the place where to document it:

• It does not feel right to do it in each project using tox because many of them lack documentation either way.
• Since I use pyenv, I could document how to use it with tox but then, I would not find it when I follow the tox installation.
• I would personally expect a section in the install instructions on how to satisfy the requirements - namely the different Python versions and some operating system specifics.

Is there any resistance to a small section? Is there more to consider?