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from __future__ import absolute_import, unicode_literals

import os
from django.conf import settings
from celery import Celery

# set the default Django settings module for the 'celery' program.
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'online_test.settings')

app = Celery('online_test')

# Using a string here means the worker doesn't have to serialize
# the configuration object to child processes.
# - namespace='CELERY' means all celery-related configuration keys
#   should have a `CELERY_` prefix.
app.config_from_object('django.conf:settings', namespace='CELERY')

# Load task modules from all registered Django app configs.
app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)

@app.task(name='celery.ping')
def ping():
    # type: () -> str
    """Simple task that just returns 'pong'."""
    return 'pong'