run tox on different python patch versions

Question

In short: Is there a way to have tox cycle on patch versions of python?

Long: I want the tests to be run on 2.7.7, 2.7.8, and so on, basically I'm staging on 2.7.6 and want to see if I can get rid of this warning

https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning

before going into production.

(Of course I've already tested it "by hand" with pyenv, setting 2.7.x as global building a virtualenv and testing into it, but it would be nice to have continuous integration run every time all the possible combinations)

Answer 1

Which exact version tox uses when specifying -e py27 depends on your platform, default paths, and your PATH. If you want to have full control over which version it takes, you should install tox-globinterpreter and run

for x in $(seq 7 12); do
    tox --scan /opt/python/2.7."$x"/bin/python
    tox -r -e py27
done

in the directory where your tox.ini is installed. The above assumes you have your python installation next to each other under /opt/python/ with the version number as install directory under that, other locations/schemes are of course possible, but only when there is some regularity you can use a for loop.

tox-globinterpreter still only allows you one binary python version per tox version indicator ( py27 , py35 , py36 , pypy , etc) but allows you fine tuned control over selecting the actual python used for each of these.