I have a simple Django project (namely the one from this tutorial).

The main part of the tree looks like this:

.
├── env
├── proj
│   ├── proj
│   │   ├── __init__.py
│   │   ├── settings.py
│   │   ├── urls.py
│   │   └── wsgi.py
│   ├── api
│   │   ├── __init__.py
│   │   ├── serializers.py
│   │   ├── urls.py
│   │   └── views.py
│   ├── base
│   │   ├── __init__.py
│   │   ├── admin.py
│   │   ├── apps.py
│   │   ├── models.py
│   │   ├── tests.py
│   │   └── views.py
│   └── manage.py
├── __init__.py
└── README.md 

In the tutorial the outer proj folder is the root.
In api/views.py is the following import: from base.models import Item
When I print sys.path in settings.py, it contains /path/to/wrapper/proj.
But I would like my root folder to be one level higher.

This is what I did:

• go to Settings > Project structure and change content root to /path/to/wrapper
• append another .parent to BASE_DIR in settings.py
  (now BASE_DIR = Path(__file__).resolve().parent.parent.parent)
• prepend proj. to imports
  (now from proj.base.models import Item)

But that does not work: ModuleNotFoundError: No module named 'proj.base'
When I print sys.path in settings.py, it still contains /path/to/wrapper/proj
instead of /path/to/wrapper.
Where does that actually come from? And how can I change it?

(Apparently the content root in the settings is only for syntax highlighting and code completion.)