django-constance/constance/settings.py

import os
from constance.utils import import_module_attr

settings = import_module_attr(
    os.getenv('CONSTANCE_SETTINGS_MODULE', 'django.conf.settings')
)

PREFIX = getattr(settings, 'CONSTANCE_REDIS_PREFIX',
         getattr(settings, 'CONSTANCE_PREFIX', 'constance:'))

BACKEND = getattr(settings, 'CONSTANCE_BACKEND', 'constance.backends.redisd.RedisBackend')

CONFIG = getattr(settings, 'CONSTANCE_CONFIG', {})

CONNECTION_CLASS = getattr(settings, 'CONSTANCE_REDIS_CONNECTION_CLASS',
                   getattr(settings, 'CONSTANCE_CONNECTION_CLASS', None))

REDIS_CONNECTION = getattr(settings, 'CONSTANCE_REDIS_CONNECTION',
                   getattr(settings, 'CONSTANCE_CONNECTION', {}))

DATABASE_CACHE_BACKEND = getattr(settings, 'CONSTANCE_DATABASE_CACHE_BACKEND',
                                 None)