@shared_task decorator doesn't work

Question

The problem: @shared_task decorator doesn't work, when I import data from custom files. I mean, when I start celery, all tasks under @shared_task doesn't appear in list of tasks.

For example, in this case @shared_task decorator doesn't work:

from __future__ import absolute_import, unicode_literals

from celery import shared_task

from .models import foo


@shared_task
def my_foo_backup(id):
    my_foo = foo(....)
    ...
    ...

This is example, when @shared_task works:

from __future__ import absolute_import, unicode_literals

from celery import shared_task


@shared_task
def my_foo_backup(id):
    my_foo = foo(....)
    ...
    ...

Why?!?

Answer 1

The solution to that problem was to move import commands inside the function. In that way it works fine and according to the rules of PEP8.

from __future__ import absolute_import, unicode_literals

from celery import shared_task


@shared_task
def my_foo_backup(id):
    from .models import foo

    my_foo = foo(....)
    ...
    ...