Utility functions for Django settings.py

django-settings-utils.py

import os


# utility for getting settings from the environment
NOT_PROVIDED = object()


def env(key, default=NOT_PROVIDED, coerce=str):
    if default is NOT_PROVIDED:
        val = os.environ.get(key)
        if val is None:
            raise ValueError("Environment variable %s is required." % key)
    else:
        val = os.environ.get(key, default)
    return coerce(val) if val is not None else val