A splitted settings version

settings-__init__.py

# -*- coding: utf-8 -*-

from __future__ import absolute_import, division, unicode_literals

import os
from django.utils.importlib import import_module
from unipath import Path

SETTINGS_ROOT = Path(__file__).parent
PROJECT_ROOT = SETTINGS_ROOT.parent


def load_settings(app_name=None, settings_name=None, debug=True):
    """
        Load settings from following locations, in order.

        settings/<settings_name>.py
        <app_name>/settings/__init__.py or <app_name>/settings.py
        settings/<app_name>_settings.py
    """

    if not app_name and not settings_name:
        raise ValueError("What you are thinking that I will load if you don't"
                         " send me app_name or settings_name?")

    if settings_name:
        settings_name = settings_name.replace('.py', '')
        settings_name = "%s.py" % settings_name
        settings_path = SETTINGS_ROOT.child(settings_name)
        if settings_path.exists() and settings_path.isfile():
            execfile(settings_path, globals())
            if debug:
                print "Loaded settings from %s" % settings_name
    else:
        try:
            mod = import_module("%s/settings" % app_name)
            execfile(mod.__file__, globals())
            if debug:
                print "Loaded settings from %s" % mod.__file__
        except ImportError:
            fname = "%s_settings.py" % app_name
            settings_path = SETTINGS_ROOT.child(fname)
            if settings_path.exists() and settings_path.isfile(fname):
                execfile(settings_path, globals())
                if debug:
                    print "Loaded settings from %s" % fname

# load defaults
load_settings(settings_name='defaults.py')

# load settings for each app
for app_name in INSTALLED_APPS:
    load_settings(app_name)

# load env settings
env_settings_name = os.environ.get('APP_ENV',  'dev')
load_settings(settings_name=env_settings_name)

# load local settings
load_settings(settings_name='settings_local')

settings_tree.txt

demo$ tree settings/
settings/
├── db.py
├── defaults.py
├── dev.py
├── __init__.py
├── production.py
└── qas1.py