Trying to work around the issue with a
#pip uninstall transaction # <-- that package was not installed on my system!
pip uninstall zope.interface
pip install transaction
pip install zope.interface
as taken from http://stackoverflow.com/questions/40583855/importerror-
If I remember correctly, I get the errors since I updated python's
"setuptools" to work on certbot (development tools), similar to what is
demonstrated at https://community.letsencrypt.org/t/cant-install-
certbot-on-debian-jessy-unmet-dependencies/19417.
Pip now shows these packages and versions:
