django-myApp
|--myApp
|  |--models
|     |--file1.py
|     |--file2.py
|--setup.py
|--README.rst

django-myApp
|--myApp
|  |--models
|     |--file1.py
|     |--file2.py
|--setup.py
|--README.rst

my-django-project
|--my_django_project
|  |--settings.py
|  |--urls.py
|  |--wsgi.py
|  |--...
|--manage.py

(myvenv) $ pip install --editable /path/to/django-myApp

def make_migrations():
    from django.core.management import call_command
    call_command('makemigrations', '<YOUR APP NAME>')


if __name__ == '__main__':
    import sys
    # I need to add the 'src' folder to PYTHON PATH
    sys.path.append('./src/')

    try:
        from django.conf import settings

        settings.configure(
            INSTALLED_APPS=[
                '<ANY APPS YOUR APP DEPENDS ON>',
                '<YOUR APP NAME>',
            ],
        )

        import django
        django.setup()

    except ImportError:
        import traceback
        traceback.print_exc()
        raise ImportError('To fix this error, sort out the imports')

    make_migrations()