def _vpn_signal_handler(self, args):
        """Called on NetworkManager PropertiesChanged signal"""
        # 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()
Called on NetworkManager PropertiesChanged signal