django-environ 从环境变量获取参数

django-environ 是一个 Python 包，它可以帮助您的Django配置环境变量。

安装

python -m pip install django-environ

要求

Django >= 1.11

Python >= 3.5

使用

import environ
import os

env = environ.Env(
    # set casting, default value
    DEBUG=(bool, False)
)

# Set the project base directory
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

#从.env 文件读取配置参数
environ.Env.read_env(os.path.join(BASE_DIR, '.env'))

# False if not in os.environ because of casting above
DEBUG = env('DEBUG')

# Raises Django's ImproperlyConfigured
# exception if SECRET_KEY not in os.environ
SECRET_KEY = env('SECRET_KEY')

# Parse database connection url strings
# like psql://user:[email protected]:8458/db
DATABASES = {
    # read os.environ['DATABASE_URL'] and raises
    # ImproperlyConfigured exception if not found
    #
    # The db() method is an alias for db_url().
    'default': env.db(),

    # read os.environ['SQLITE_URL']
    'extra': env.db_url(
        'SQLITE_URL',
        default='sqlite:////tmp/my-tmp-sqlite.db'
    )
}

CACHES = {
    # Read os.environ['CACHE_URL'] and raises
    # ImproperlyConfigured exception if not found.
    #
    # The cache() method is an alias for cache_url().
    'default': env.cache(),

    # read os.environ['REDIS_URL']
    'redis': env.cache_url('REDIS_URL')
}

官方文档

https://django-environ.readthedocs.io/en/latest/install.html