["python","environment-variables","python-dotenv"]
What is the use of python-dotenv?

Need an example and please explain me the purpose of python-dotenv. I am kind of confused with the documentation.
From the Github page: 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. Assuming you have created the .env file along-side your settings module. . ├── .env └── 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 is a simple text file with each environment variable listed one per line, in the format of KEY="Value". The lines starting with # are ignored. SOME_VAR=someval # I am a comment and that is OK FOO="BAR"