manage.py

#!/usr/bin/env python
from __future__ import print_function
import os
import sys


def run():
    custom_settings = "tardis.settings"
    custom_settings_file = custom_settings.replace(".", "/") + ".py"
    demo_settings = "tardis.default_settings"
    if os.path.isfile(custom_settings_file):
        os.environ.setdefault("DJANGO_SETTINGS_MODULE", custom_settings)
    else:
        os.environ.setdefault("DJANGO_SETTINGS_MODULE", demo_settings)
        if os.environ["DJANGO_SETTINGS_MODULE"] == demo_settings:
            print(
                'Using demo settings in "tardis/default_settings.py",'
                " please add your own settings file, "
                '"tardis/settings.py".'
            )

    from django.core.management import execute_from_command_line

    execute_from_command_line(sys.argv)


if __name__ == "__main__":
    from django.core.exceptions import ImproperlyConfigured

    try:
        run()
    except ImproperlyConfigured as e:
        if "SECRET_KEY" in str(e):
            print(
                r"""
# execute this wonderful command to have your settings.py created/updated
# with a generated Django SECRET_KEY (required for MyTardis to run)
python -c "import os; from random import choice; key_line = '%sSECRET_KEY=\"%s\"\n' % ('from .default_settings import *  # pylint: disable=W0401,W0614\n\n' if not os.path.isfile('tardis/settings.py') else '', ''.join([choice('abcdefghijklmnopqrstuvwxyz0123456789@#%^&*(-_=+)') for i in range(50)])); f=open('tardis/settings.py', 'a+'); f.write(key_line); f.close()"
"""
            )
        else:
            raise