code: def _vpn_signal_handler(self, args):
          
          # Args is a dictionary of changed properties
          # We only care about changes in ActiveConnections
          active = "ActiveConnections"
          # Compare current ActiveConnections to last seen ActiveConnections
          if active in args.keys() and sorted(self.active) != sorted(args[active]):
              self.active = args[active]
              self.py3.update()
docs: Called on NetworkManager PropertiesChanged signal