PyPi：https://pypi.org/project/python-dotenv/

介紹

Reads the key-value pair from .env file and adds them to environment variable. It is great for managing app settings during development and in production using 12-factor principles.
Do one thing, do it well!

安裝

pip install -U python-dotenv

基本用法

The easiest and most common usage consists on calling load_dotenv when the application starts, which will load environment variables from a file named .env in the current directory or any of its parents or from the path specificied; after that, you can just call the environment-related method you need as provided by os.getenv.

.env檔案內容類似：

# a comment that will be ignored.
REDIS_ADDRESS=localhost:6379
MEANING_OF_LIFE=42
MULTILINE_VAR="hello\nworld"

CONFIG_PATH=${HOME}/.config/foo
DOMAIN=example.org
EMAIL=admin@${DOMAIN}
DEBUG=${DEBUG:-false}

在設定檔案里加載

# settings.py
from dotenv import load_dotenv
load_dotenv()

# OR, the same with increased verbosity
load_dotenv(verbose=True)

# OR, explicitly providing path to '.env'
from pathlib import Path  # Python 3.6+ only
env_path = Path('.') / '.env'
load_dotenv(dotenv_path=env_path)
 

讀取示例

# settings.py
import os
SECRET_KEY = os.getenv("EMAIL")
DATABASE_PASSWORD = os.getenv("DATABASE_PASSWORD")

更多內容見 pypi