def handle_noargs(self, **options):
        verbosity = int(options.get("verbosity", 1))

        # fetch all of the backends (identified by their
        # name) that we already have instances for
        known_backend_names = list(Backend.objects\
            .values_list("name", flat=True))

        # find any running backends which currently
        # don't have instances, and fill in the gaps
        for name in settings.INSTALLED_BACKENDS:
            if not name in known_backend_names:
                known_backend_names.append(name)
                backend = Backend.objects.create(
                    name=name)

                # log at the same level as syncdb's "created table..."
                # messages, to stay silent when called with -v 0
                if verbosity >= 1:
                    print backend % "Added persistant backend %s"
dataset/ETHPy150Open rapidsms/rapidsms-core-dev/lib/rapidsms/management/commands/update_backends.py/Command.handle_noargs/swapped operands of `%`