def handle(self, *app_labels, **options):

        # Activate project's default language
        translation.activate(settings.LANGUAGE_CODE)

        comment = options["comment"]
        batch_size = options["batch_size"]
        database = options.get('database')

        verbosity = int(options.get("verbosity", 1))
        app_list = OrderedDict()
        # if no apps given, use all installed.
        if len(app_labels) == 0:
            all_apps = [config.models_module for config in apps.get_app_configs()
                        if config.models_module is not None]
            for app in all_apps:
                if not app_list in app:
                    app_list[app] = []
                for model_class in apps.get_models(app):
                    if not model_class in app_list[app]:
                        app_list[app].append(model_class)
        else:
            for label in app_labels:
                try:
                    app_label, model_label = label.split(".")
                    try:
                        app = get_app(app_label)
                    except ImproperlyConfigured:
                        raise CommandError("Unknown application: %s" % app_label)

                    model_class = apps.get_model(app_label, model_label)
                    if model_class is None:
                        raise CommandError("Unknown model: %s.%s" % (app_label, model_label))
                    if app in app_list:
                        if app_list[app] and model_class not in app_list[app]:
                            app_list[app].append(model_class)
                    else:
                        app_list[app] = [model_class]
                except ValueError:
                    # This is just an app - no model qualifier.
                    app_label = label
                    try:
                        app = get_app(app_label)
                        if not app in app_list:
                            app_list[app] = []
                        for model_class in apps.get_models(app):
                            if not model_class in app_list[app]:
                                app_list[app].append(model_class)
                    except ImproperlyConfigured:
                        raise CommandError("Unknown application: %s" % app_label)
        # Create revisions.
        for app, model_classes in app_list.items():
            for model_class in model_classes:
                self.create_initial_revisions(app, model_class, comment, batch_size, verbosity, database=database)

        # Go back to default language
        translation.deactivate()
dataset/ETHPy150Open etianen/django-reversion/src/reversion/management/commands/createinitialrevisions.py/Command.handle/swapped operands of `in`