def get_template_path(self, template_name, template_dirs=None):
        template_parts = template_name.split(":", 1)

        if len(template_parts) != 2:
            raise TemplateDoesNotExist()

        app_label, template_name = template_parts
        app = apps.get_app_config(app_label)
        app_dir = dirname(app.module.__file__)
        template_dir = abspath(join(app_dir, 'templates'))
        return join(template_dir, template_name)
Try to split template name by ':' to get app_label
dataset/ETHPy150Open allegro/ralph/src/ralph/lib/template/loaders.py/AppTemplateLoader.get_template_path