If, like me, you build Python 3.6 from source and make it your default 'python3' binary, you may run into issues with the latest apt-listchanges, which has switched to using Python 3. The symptom is an ImportError trying to "import debconf", which is available in dist-packages in the system Python, but (naturally) isn't part of Python 3.6's install tree.
My solution: sudo ln -s /usr/lib/python3/dist-packages/debconf.py /usr/local/lib/python3.6/site-packages/ And then apt-listchanges happily sets itself up. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
