Celery – schedule tasks with pauses between them

I needed to schedule 10 tasks that have these conditions

  1. A time gap between tasks is fixed (but varies)
  2. No need to pass results of one task to another
  3. Need to read a database in every task (important: at the moment of the execution)

I tried a few options, and this one worked

 ret = chain(task1.si(args).set(countdown=30*1), ..., task10.si(args).set(countdown=30*10)).apply_sync()

Important note – the signature here is not .s() but .si() this way you don’t pass the result of task1 to task2. You set the countdown with set() and not inside the apply_sync().

It is simple but it took me some time to figure out.

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