파이썬 celery-django 오류: Requested setting DEFAULT_INDEX_TABLESPACE, but settings are not configured.

Error : 

django.core.exceptions.ImproperlyConfigured: Requested setting DEFAULT_INDEX_TABLESPACE, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.

방법 :

/celery.py

import os

os.environ.setdefault('DJANGO_SETTINGS_MODULE', '프로젝트폴더이름.settings')

를 추가해주면 된다.

more :

http://docs.celeryproject.org/en/latest/django/first-steps-with-django.html#django-first-steps