I went through this example here:
http://docs.celeryproject.org/en/latest/django/first-steps-with-django.html
All my tasks are in files called tasks.py.
got the same error
my celery settings filename which was(celery.py) was conflicting with 'celery' package...
so while doing this-> from celery import Celery , it was raising error- cannot import name Celery
solution->just change the 'celery.py' to something else like 'celery-settings.py'