Track Tor relay contacts over time and display changes (new and gone contacts).
git clone https://github.com/moba/tor-contacts-tracker.git
./tor-contacts-tracker.py --download # downloads current dataset from onionoo
./tor-contacts-tracker.py --update [path_to_details_json] # import from details.json to local database
./tor-contacts-tracker.py # prints changes within the last days (*)
(*) currently, the timespan is not really useful apart from 'debugging'