Comment 3 for bug 1429521

Hi,
I've checked it again with a fresh LXC container of vivid. The issue is still reproducible with the same version as you posted.
python3-flake8: 2.2.2-1ubuntu1
python3-pep8: 1.5.7-2

Interestingly executing pep8 alone does not output any errors.

$ python3 -m pep8 -vv foo.py
checking foo.py
pass

$ python3 -m flake8 -vv foo.py
<the same traceback>