define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings

Question

I originally installed Python 3.10.4 on my windows 11 OS. I then installed virtualenv, via pip, ran the virutalenv worked fine. I then Installed Django with the env open.

I tried... Restarted my computer and got this error when I try to run django-admin runserver in env. I've also installed it in Ubuntu 22.04.1 LTS, I get the same error.

I opened the manage.py and changed ('DJANGO_SETTINGS_MODULE', 'mysite.settings')

Error ImproperlyConfigured: You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.

#!/usr/bin/env python
"""Django's command-line utility for administrative tasks."""
import os
import sys


def main():
    """Run administrative tasks."""
    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'real_virgin.settings')
    try:
        from django.core.management import execute_from_command_line
    except ImportError as exc:
        raise ImportError(
            "Couldn't import Django. Are you sure it's installed and "
            "available on your PYTHONPATH environment variable? Did you "
            "forget to activate a virtual environment?"
        ) from exc
    execute_from_command_line(sys.argv)


if __name__ == '__main__':
    main()