@shared_task
def post_notification(data,url):
    url = "http://posttestserver.com/data/?dir=praful" # when in production, remove this line.
    headers = {'content-type': 'application/json'}
    requests.post(url, data=json.dumps(data), headers=headers)


@shared_task
def shipment_server(data,notification_type):
    notification_obj = Notification.objects.get(name = notification_type)
    server_list = ServerNotificationMapping.objects.filter(notification_name=notification_obj)

    for server in server_list:
        task = post_notification.delay(data,server.server_id.url)
        print task.status # it prints 'Nonetype' has no attribute id

for server in server_list:
    task = group(post_notification.s(data, server.server_id.url))().get()
    print task.status

TxIsolationWarning: Polling results w│
ith transaction isolation level repeatable-read within the same transacti│
on may give outdated results. Be sure to commit the transaction for each │
poll iteration.                                                          │
  'Polling results with transaction isolation level '

celery.current_app.send_task('mymodel.tasks.mytask', args=[arg1, arg2, arg3])

from app.tasks import celery_add_task
    celery_add_task.apply_async(args=[task_name])

from celery import group

@shared_task
def shipment_server(data,notification_type):
    notification_obj = Notification.objects.get(name = notification_type)
    server_list = ServerNotificationMapping.objects.filter(notification_name=notification_obj)


    tasks = [post_notification.s(data, server.server_id.url) for server in server_list]
    results = group(tasks)()
    print results.get() # results.status() what ever you want