DAG which get scheduled at given interval and

Yes exactly what will be part of the next iteration of the controller/service

an example achieving what i propose would be greatly helpful

Would this help?
from trains.automation import TrainsJob job = TrainsJob(base_task_id='step1_task_id_here') job.launch(queue_name='default') job.wait() job2 = TrainsJob(base_task_id='step2_task_id_here') job2.launch(queue_name='default') job2.wait()