# manage.py
import os
import sys

import class_settings
from class_settings import env

from django.core.management import execute_from_command_line

if __name__ == '__main__':
    env.read_env()
    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'myproject.settings')
    os.environ.setdefault('DJANGO_SETTINGS_CLASS', 'MySettings')
    class_settings.setup()
    execute_from_command_line(sys.argv)

# myproject/settings.py
from class_settings import Settings, env


class MySettings(Settings):
    SECRET_KEY = env()
    DEBUG = env.bool(default=False)
    INSTALLED_APPS = [
        'django.contrib.admin',
        'django.contrib.auth',
        'django.contrib.contenttypes',
        'django.contrib.sessions',
        'django.contrib.messages',
        'django.contrib.staticfiles',
    ]
    ROOT_URLCONF = 'myproject.urls'
    WSGI_APPLICATION = 'myproject.wsgi.application'