testing using tox and pyenv on Ubuntu 20.04

Question

I am trying to run test suite on requests code base on Ubuntu 20.04. I noticed that it needs tox and different python versions to run different tests and compatibility checks. I did the following:

1. Installed tox using:

$> pip install tox

2. Installed pyenv as per documentation here
3. Installed python 3.7 using pyenv. I was able to create and use virtual environment using pyenv after this step.

# install python 3.7.17
$ requests> pyenv install 3.7
# make it available to the project
$ requests> pyenv local 3.7.17

4. Execute tox only for python 3.7

$ requests> tox -e py37

On doing so i get the following error

ModuleNotFoundError: No module named 'virtualenv.seed.embed.via_app_data'

It doesn't seem to work, even-though I have virtualenv and virtualenv-wrapper installed already. How do I get it to work?

Answer 1

The issue was having used apt to install the packages as suggested by @mirek as suggested here. I removed the python3-virtualenv using apt purge python3-virtualenv and then install everything using pip /usr/bin/python3.8 -m pip install --force-reinstall virtualenvwrapper

This seems to at least help me run the tests.