django settings.py code for deloyment

settings.py

import os
import json

from django.core.exceptions import ImproperlyConfigured


# Set ENV with system variable 'DJANGO_ENV'. If 'DJANGO_ENV' is not present, then use 'development' as ENV.
# In production server, set 'DJANGO_ENV' as 'production'
ENV = os.getenv('DJANGO_ENV', 'development')

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
CONFIG_DIR = os.path.dirname(os.path.abspath(__file__))
CONFIG_VARIABLES_DIR = os.path.join(CONFIG_DIR, 'variables')

# Set paths of variable files
CONFIG_VARIABLES_FILE = os.path.join(CONFIG_VARIABLES_DIR, ENV + '.json')
with open(CONFIG_VARIABLES_FILE) as file:
    CONFIG_VARIABLES = json.loads(file.read())


def get_config_variable(key, config_variable=CONFIG_VARIABLES, env=ENV):
    try:
        return config_variable[key]
    except KeyError:
        error_msg = "Set the variable '{}' in 'project/config/variables/{}.json'".format(key, env)
        raise ImproperlyConfigured(error_msg)


# Below variables will be loaded from development.py or production.py.
# SECRET_KEY, DEBUG, ALLOWED_HOSTS


SECRET_KEY = get_config_variable('SECRET_KEY')

DEBUG = get_config_variable('DEBUG')

ALLOWED_HOSTS = get_config_variable('ALLOWED_HOSTS')

# ...