Django-celery Error in Calling apply_async() - takes 1 positional arguement but xx were given

This error confused me initially and the Celery documentation wasn't directly helpful. 

 Traceback (most recent call last):  
  File "<stdin>", line 1, in <module>  
  File "/Users/jaypax/.local/share/virtualenvs/server-9an_1rEM/lib/python3.6/site-packages/celery/app/task.py", line 518, in apply_async  
   check_arguments(*(args or ()), **(kwargs or {}))  
 TypeError: run_scraper_one() takes 1 positional argument but 40 were given  

I called my task as run_scraper_one.apply_sync(args=('keywords here'), countdown=5). 

The run_scraper_one() method is decorated with @shared_app. So this should work. Should. But apparently after digging around: here and here, I figured out that it wants a list or tuple. 

So, the correct way to invoke the task is: 

run_scraper_one.apply_async(("keyword here",), countdown=5)

Fixed.