)

        self.mean_consensus_weight_fraction = calculate_weight(

            data.consensus_weight_fraction

        )

    def update_flags(self):

        try:

            data = manager.query('details', lookup=self.fingerprint)

        except:

            raise NotImplementedError

        if data is not None:

            self.flags = data.relays[0].flags

        else:

            raise NotImplementedError

    def check_status(self):

        now = datetime.utcnow()

        delta = now - self.last_updated

        if delta.seconds >= 3600:

            self.status = False

        elif delta.seconds >= 600:

            self.status = None