Python load dynamic settings module through environment

__init__.py

# -* coding: utf-8 *-
"""
Config import handler
This let us import settings, and don't care about:
>>> settings = importlib.import_module('module_name')
"""
import os
import importlib

my_module = importlib.import_module(os.getenv('SETTINGS_MODULE'))

my_module_dict = my_module.__dict__

try:
    to_import = my_module.__all__
except AttributeError:
    to_import = [name for name in my_module_dict if not name.startswith('_')]

globals().update({name: my_module_dict[name] for name in to_import})

local.py

# -* coding: utf-8 *-
MY_SETTINGS = 'local'
MY_DB = 'localDB'

production.py

# -* coding: utf-8 *-
MY_SETTINGS = 'production'
MY_DB = 'productionDB'

sample.py

from my_package import settings
print settings.MY_DB