Some of the code in trace-summary is not valid syntax on
Python version >= 3. It should be updated to work on
any Python version >= 2.6.
Do you already know the list of problems that need addressed? (probably not worth documenting?)
All the work is done in branch topic/dnthayer/ticket1304. The one remaining task is
to get pysubnettree (which lives in a different git repo) compatible with Python 3.
Currently, trace-summary requires pysubnettree.