Celery worker for application factory

celery_worker.py

"""The celery worker has to be started to handle the tasks of celery.

This pattern is followed because we're instantiating the flask application through
flask's application factory. The context of the application is required.
"""
from project import create_app # Flask application factory is used. 
from project import celery # This is the celery instance that needs to be instantiated when a flask app is created. 
import logging

logger = logging.getLogger('celery')
logger.setLevel(logging.DEBUG)
logger.propagate = True  # To show the logs on celery worker
app = create_app()
app.app_context().push()  # This is the most important thing.