This is the sample code used in the Real Python article How to Write an Installable Django App. The article describes how to take an app from an existing Django project and make it a stand-alone installable package available on PyPI.

This app models a list of items on a receipt. Each item has a description and a cost. A receipt may reference multiple items.

This app can be installed and used in your Django project with:

$ pip install realpython-django-receipts

Edit your settings.py file to include 'receipts' in the INSTALLED_APPS listing.

INSTALLED_APPS = [
    ...

    'receipts',
]

Edit your project urls.py file to import the URLs:

url_patterns = [
    ...

    path('receipts/', include('receipts.urls')),
]

Finally, add the models to your database:

$ ./manage.py makemigrations receipts

The before folder shows the "before" case -- the Django project before the app was made installable.

• Article: https://realpython.com/installable-django-app/
• Source: https://github.com/realpython/django-receipts
• PyPI: https://pypi.org/project/realpython-django-receipts/