need to restart python while applying Celery config

问题

That's a small story...

I had this error:

AttributeError: 'DisabledBackend' object has no attribute '_get_task_meta_for'

When changed tasks.py, like Diederik said at Celery with RabbitMQ: AttributeError: 'DisabledBackend' object has no attribute '_get_task_meta_for'

app = Celery('tasks', backend='rpc://', broker='amqp://guest@localhost//')

ran it

>>> from tasks import add
>>> result = add.delay(4,50)
>>> result.ready()

got DisabledBackend again ... hmm what was that..

put code to file run.py and it returned True...

from tasks import add
try:
        result = add.delay(1,4)
        print (result.ready())
except:
        print "exept"

I see that if I call >>> from tasks import add after tasks.py changed, it doesn't get the updates... That behaviour is the same for ipython, so because of I can't understand the reason, I advice people to DEBUG from scripts like ~runthis.py

Will be glad for answer which will smash my idea...

回答1:

If using the interpreter, you need to

reload(tasks)

this will force reimport tasks module

来源：https://stackoverflow.com/questions/39998083/need-to-restart-python-while-applying-celery-config