CI workflow failing: lint (3.10) is trying to use python3.9

[sparrowt]

Problem

Recently the 'CI' workflow has been failing because for some reason the lint (3.10) step is trying to find python3.9

Run tox -v -e flake8 -- -v
flake8: find interpreter for spec PythonSpec(major=3, minor=9)
...
flake8: skipped because could not find python interpreter with spec(s): python3.9
  flake8: SKIP (0.61 seconds)
  evaluation failed :( (0.84 seconds)
Error: Process completed with exit code 255.

This seems to be happening on all PRs e.g. like this

Cause

#1663 added python 3.10 to CI and set it as the python-version under lint in ci.yaml but didn't change the basepython for flake8 and friends in tox.ini to match.

Looking back to the change for python 3.9 (4f77faa) we do see that flake8 & friends were moved down a line so I think the same needs to happen here (though it feels odd that we have to specify the same thing in 2 places).

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[auvipy]

thanks a lot for the investigation

[sparrowt]

Np! I was going to open a PR today but I see you already have ❤ #1700

[stegayet]

This has been fixed in #1718, thanks a lot for your initial investigation @sparrowt 😄

[auvipy]

thanks both of you