Python tox doesn't build anymore

Feedback & Bug Reports
1

I have a python test suite running with tox and since this morning test suite do not run any longer and return the following error.

AttributeError: module 'virtualenv.create.via_global_ref.builtin.cpython.mac_os' has no attribute 'CPython3macOsFramework'

I did try to fix python, tox and virtualenv version to make sure it was not a versioning issue, but whatever I do that runs locally (and used to run on CircleCI) doesn’ t run on CircleCI anylonger.

Any hint would be much appreciated.

1 Like
2

I too am now experiencing this issue for a Python 3.6 Django project. The error came out of nowhere and I am unsure of how to fix it.

3

Could you share your entire config here?

4

See relevant configuration here after.

config.yaml

version: 2.1

jobs:
  test:
    docker:
      - image: circleci/python:latest
    working_directory: ~/repo
    steps:
      - checkout
      - run:
          name: install dependencies
          command: |
            pipenv install --system --dev
      - run:
          name: run tests
          command: |
            tox

pyproject.toml

[tool.tox]
legacy_tox_ini = """
[tox]
minversion = 3.14.5
envlist = py27,py37,py38

[testenv]
deps = pytest
commands =
  python setup.py clean --all build_ext --force --inplace
  {posargs:pytest -vv --ignore=src}
passenv = *
"""
5

I just found out that the problem is with tox 3.14.5 and CircleCI.
Setting tox = "!=3.14.5 in project dependencies resolves the issue on CircleCI.

1 Like
6

Thanks for sharing your workaround!

1 Like
7

Same AttributeError here but not using tox.

Seems to occur on pipenv sync for me:

pipenv sync --dev
Creating a virtualenv for this project…
Pipfile: /home/********/app/Pipfile
Using /usr/local/bin/python3 (3.7.7) to create virtualenv…
AttributeError: module 'virtualenv.create.via_global_ref.builtin.cpython.mac_os' has no attribute 'CPython3macOsFramework'

For me it seems that upgrading virtualenv seemed to resolve the issue. I added this to my config.yml:

pip install pip -U
pip install pipenv -U
pip install virtualenv -U

seems there was a bad build of virtualenv issued a while ago, where the fix is already out.

8

virtualenv is the most likely guilty indeed

tox latest release, 3.14.6, resolved the issue by excluding some specific virtualenv versions, see https://github.com/tox-dev/tox/pull/1537 for more details.

9

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