No module named 'celery.backends.amqp' or KeyError: 'backend'
from celery import Celery
app = Celery('proj',
             broker='amqp://',
             backend='rpc://',
             include=['proj.tasks'])
# Optional configuration, see the application user guide.
app.conf.update(
    result_expires=3600,
)
if __name__ == '__main__':
    app.start()
