manage.py

#!/usr/bin/env python

import os
import sys


def main() -> None:
    """
    Main function.

    It does several things:
    1. Sets default settings module, if it is not set
    2. Warns if Django is not installed
    3. Executes any given command
    """
    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "test_project.settings")

    try:
        from django.core import management
    except ImportError as err:
        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 err

    management.execute_from_command_line(sys.argv)


if __name__ == "__main__":
    main()