title: Call Django celery task by name
body: <p>I need to call a celery task (in tasks.py) from models.py, the only problem is, tasks.py imports models.py, so I can't import tasks.py from models.py.</p>
  
  <p>Is there some way to call a celery task simply using its name, without having to import it? A similar thing is implemented for ForeignKey fields for the same reason (preventing circular imports).</p>