[BUG] Tox script does not run the intended Python interpreter for each environment #1834
Description
Describe the bug
The tox.ini does not correctly use the correct the python interpreter. It creates a separate folder for each python, but those folders eventually have the same packages as the base python.
It seems that the problem is that tox falls-back to the default interpreter because it cannot find the other python on PATH. This is due to using virtual-env like pyenv.
What we need to explore:
Find a way to configure tox to use the virtual-env engine if possible in order to correctly use it.
Of course, this requires that the python-iterpreter is already installed before running the script.