python-dotenv有什么用?

What is the use of python-dotenv?(python-dotenv有什么用?)

问题描述

需要一个例子，请解释一下 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:

从 .env 中读取键值对并将它们添加到环境变量中.使用 12 要素原则在开发和生产过程中管理应用设置非常有用.

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.

假设您已在设置模块旁边创建了 .env 文件.

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

.
├── .env
└── settings.py

将以下代码添加到您的 settings.py 中

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"，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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