Django-environ example

.env-example

# project-repo/app/settings/.env-example
#
# DJANGO
#
SITE_HOST=localhost:8000
USE_SSL=False
ALLOWED_HOSTS=localhost,127.0.0.1
SECRET_KEY=asdasd
DEBUG=true  # never on production, will cause settings including api keys to leak
DJANGO_LOG_LEVEL=DEBUG
DJANGO_DEBUG_TOOLBAR=false
DJANGO_FILE_DIR=../dev
#
# POSTGRES
#
# DATABASE_URL=psql://<username>:<password>@127.0.0.1:8458/<database_name>
DATABASE_URL=psql://project1:Nnsjdajs98123udnhj93g92@127.0.0.1:8458/project1
#
# REDIS
#
# django cache
REDIS_DJANGO_CACHE_DATABASE=5
REDIS_DJANGO_CACHE_URL=rediscache://127.0.0.1:6379:5?client_class=django_redis.client.DefaultClient
# celery configuration
REDIS_CELERY_RESULTS_DATABASE=6
REDIS_CELERY_RESULTS_URL=redis://127.0.0.1:6379/6
CELERY_RESULT_BACKEND=redis://127.0.0.1:6379/6
CELERY_BROKER_URL=amqp://user:password@localhost:5672/project1-celery

default.py

# project-repo/app/settings/default.py
from .env import env

SITE_HOST = env.str('SITE_HOST')
SITE_URL_HTTP = 'http://{}'.format(SITE_HOST)
SITE_URL_HTTPS = 'https://{}'.format(SITE_HOST)

if env.bool('USE_SSL', default=False):
    DEFAULT_SITE_URL = SITE_URL_HTTPS
else:
    DEFAULT_SITE_URL = SITE_URL_HTTP

ALLOWED_HOSTS = tuple(env.list('ALLOWED_HOSTS', default=[]))

SECRET_KEY = env.str('SECRET_KEY')

# project/
REPO_ROOT_DIR = environ.Path(__file__) - 3
# project/dev/
DEV_DIR = REPO_ROOT_DIR.path('dev')
# project/dev/ or DJANGO_FILE_DIR
FILE_DIR = env.path('DJANGO_FILE_DIR', default=DEV_DIR())
# FILE_DIR is a Path object 
#   FILE_DIR() -> path string, 
#   FILE_DIR.path('db') -> Path object

if env.str('DATABASE_URL', default=''):
    DATABASES = {
        'default': env.db(),
    }
else:
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.sqlite3',
            'NAME': FILE_DIR.path('db')('django.sqlite3'),
        },
    }

env.py

# project-repo/app/settings/env.py
import environ

from common.settings import Env

__all__ = (
    'env',
)

env = Env()

# read .env file from default location or ENV_FILE_PATH
env.read_env(
    env.path(
        'ENV_FILE_PATH',
        default=(environ.Path(__file__) - 1).path('.env')()
    )())

requirements.txt

# project-repo/deployment/requirements.txt
# http://django-environ.readthedocs.io/en/latest/
django-environ==0.4.0