python-dotenv的用途是什么？ [英] What is the use of python-dotenv?

问题描述

需要一个示例，请向我解释python-dotenv的用途。

我对文档有点困惑。

Need an example and please explain me the purpose of python-dotenv.
I am kind of confused with the documentation.

推荐答案

来自 Github页面：

读取密钥从.env中获取值对，并将其添加到环境变量中。使用12因子原则在开发和生产过程中管理应用程序设置非常好。

Reads the key,value pair from .env and adds them to environment variable. It is great of managing app settings during development and in production using 12-factor principles.

假设您已经创建了.env文件，设置模块。

Assuming you have created the .env file along-side your settings module.

.
├── .env
└── settings.py

添加将以下代码添加到settings.py

Add the following code to your settings.py

# settings.py
import os
from os.path import join, dirname
from dotenv import load_dotenv

dotenv_path = join(dirname(__file__), '.env')
load_dotenv(dotenv_path)

SECRET_KEY = os.environ.get("SECRET_KEY")
DATABASE_PASSWORD = os.environ.get("DATABASE_PASSWORD")

.env是一个简单的文本文件。每行列出每个环境变量，格式为KEY = Value，将忽略以＃开头的行。

.env is a simple text file. With each environment variables listed per line, in the format of KEY="Value", lines starting with # is ignored.

SOME_VAR=someval
# I am a comment and that is OK
FOO="BAR"

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