schema.py

    def mutate(root, info, name=None, desc=None, cmd=None, tags=None, task_files=None):
        try:
            task_dict = {}
            if name:
                task_dict['name'] = name
            if desc:
                task_dict['desc'] = desc
            if cmd:
                task_dict['cmd'] = cmd
            if tags:
                task_dict['tags'] = tags
            if task_files:
                task_dict['task_files'] = task_files
            task = pipeline_api.update_task(args.get('uuid'), return_dict=False, agent=info.context['agent'], **task_dict)