Environment variables in python flask

.env

APP_ENV=local
DEBUG=True

index.py

from flask import Flask
import os
import webconfig

environment = os.getenv('APP_ENV')

requirement.txt

Flask==1.0.2
python-dotenv=0.10.1

webconfig.py

/**Create this file at the root*/
import os
from os.path import join, dirname
from dotenv import load_dotenv
/** this variable(IS_SERVER) will only be set on the production*/
is_prod = os.environ.get('IS_SERVER', None)
if not is_prod:
    /**these settings will load up only when we are in a Local environment from the env file*/
    dotenv_path = join(dirname(__file__), '.env')
    load_dotenv(dotenv_path, verbose=True)
else:
    /**these settings will load up only when we are in a server environment*/
    APP_ENV = os.environ.get('APP_ENV')
    DEBUG = os.environ.get('DEBUG')