<filename>sandbox/apps/app.py
from oscar.app import Shop
from apps.checkout.app import application  as checkout_app


class GoCardlessShop(Shop):
    checkout_app = checkout_app


shop = GoCardlessShop()

<filename>sandbox/apps/app.py
from oscar.app import Shop
from apps.checkout.app import application  as checkout_app


class GoCardlessShop(Shop):
    checkout_app = checkout_app


shop = GoCardlessShop()
