Tox tests do not work

[tillea]

Hi,
when trying to upgrade the paleomix Debian package to version 1.2.12 I also wanted to run the topx test suite. Unfortunately I get:

$ tox
GLOB sdist-make: /home/tillea/debian-maintain/alioth/debian-med_git/paleomix/setup.py
ERROR: invocation failed (exit code 1), logfile: /home/tillea/debian-maintain/alioth/debian-med_git/paleomix/.tox/log/tox-0.log
ERROR: actionid: tox
msg: packaging
cmdargs: ['/usr/bin/python3', local('/home/tillea/debian-maintain/alioth/debian-med_git/paleomix/setup.py'), 'sdist', '--formats=zip', '--dist-dir', local('/home/tillea/debian-maintain/alioth/debian-med_git/paleomix/.tox/dist')]
env: None

ERROR: Python version 2.7.x required!
       Current version is v3.5.3 (default, Jan 19 2017, 14:11:04)  [GCC 6.3.0 20170118]

ERROR: FAIL could not package project - v = InvocationError('/usr/bin/python3 .../debian-med_git/paleomix/setup.py sdist --formats=zip --dist-dir .../debian-med_git/paleomix/.tox/dist (see .../debian-med_git/paleomix/.tox/log/tox-0.log)', 1)

The machine where I tried to run this test has

$ python --version
Python 2.7.13
$ python3 --version
Python 3.5.3

Any hint what might went wrong here?

BTW, in Debian it is considered a good idea to move to Python3 rather sooner than later - but the interpreter that you call with simply python will remain the 2.x series of Python.

Kind regards, Andreas.