Combine an otree django project with oscar django project and pass data around?

[Alexander Rogowski]

I have an oTree survey and I am working on an oscar shop. Now I want to combine them.

I first start the otree project (locally, otree devserver on port 8000). After the questions, I start a subprocess to call another server (py manage.py runserver, port 8080) and open another browser tab. 

Based on the answers, I would like to assign the player budget in the shop. How can I pass data through the projects?

from survey.models import Player  # otree models

class CatalogueView(TemplateView):
 """
 Browse all products in the catalogue
 """
 model = Player
 context_object_name = "products"

But I just get this error: 

ModuleNotFoundError: No module named 'otree'

I also put otree to INSTALLED_APPS and I tried to import otree.api.

Any ideas, how to handle this?