Chaos: import errors preventing running locally

% python3 chaos.py

Traceback (most recent call last):
  File "chaos.py", line 13, in <module>
    import github_api.prs
  File "/mnt/d/dev/projects/chaos/github_api/prs.py", line 4, in <module>
    from . import voting
  File "/mnt/d/dev/projects/chaos/github_api/voting.py", line 5, in <module>
    from . import prs
ImportError: cannot import name 'prs'

Do I need a different version of python to support circular imports in local directories?