Celery, calling delay with countdown

Just to add to iklinac's answer. This is how you would call the task using apply_async()

my_task.apply_async(args=(param1, param2), countdown=60)

or

my_task.apply_async(kwargs={'param1':param1, 'param2':param2}, countdown=60)

The second option will really come in handy if you are using a tool like Flower for monitoring. You can look at Celery tasks best practices page for other tips.

From basic part of celery Calling documentation

delay(*args, **kwargs)

Shortcut to send a task message, but doesn’t support execution options.

So delay is clearly convenient, but if you want to set additional execution options you have to use apply_async.

As documentation states delay cannot be used with additional options set so you should just convert your call into apply_async

If you want to add execution options, the docs suggest you use a signature. e.g:

my_task.s(arg1, arg2).apply_async(countdown=60)