About Questionary Library for Settings Selection

(.venv)$ pip install questionary

#!/usr/bin/env python
import os
import sys
from pathlib import Path


def discover_settings_modules():
    settings_dir = Path(__file__).resolve().parent / "djangotricks" / "settings"
    return sorted(
        f"djangotricks.settings.{p.stem}"
        for p in settings_dir.glob("*.py")
        if not p.stem.startswith("_")
    )


def _settings_from_argv():
    """Return the value of --settings from sys.argv, or None."""
    import argparse

    parser = argparse.ArgumentParser(add_help=False)
    parser.add_argument("--settings", default=None)
    args, _ = parser.parse_known_args()
    return args.settings


def select_settings():
    """Prompt the user to choose a settings module when running interactively."""
    cli_settings = _settings_from_argv()
    if cli_settings:
        os.environ["DJANGO_SETTINGS_MODULE"] = cli_settings
        return

    if "DJANGO_SETTINGS_MODULE" in os.environ:
        return

    # Non-interactive environments (e.g. CI, pipes) skip the prompt.
    if not sys.stdin.isatty():
        return

    import questionary

    modules = discover_settings_modules()
    if not modules:
        return

    choice = questionary.select(
        "Select settings module:",
        choices=modules,
    ).ask()

    if choice is None:
        # User cancelled (Ctrl-C / Ctrl-D).
        sys.exit(1)

    os.environ["DJANGO_SETTINGS_MODULE"] = choice


if __name__ == "__main__":
    select_settings()

    try:
        from django.core.management import execute_from_command_line
    except ImportError:
        try:
            import django  # noqa: F401
        except ImportError:
            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?"
            )
        raise
    execute_from_command_line(sys.argv)

djangotricks/
├── __init__.py
└── settings/
    ├── __init__.py
    ├── _base.py
    ├── dev.py
    ├── test.py
    ├── staging.py
    └── production.py

(.venv)$ python manage.py shell
? Select settings module: (Use arrow keys)
 » djangotricks.settings.dev
   djangotricks.settings.production
   djangotricks.settings.staging
   djangotricks.settings.test