Django configuration framework idea

__init__.py

# This would be your settings module (settings/__init__.py)

class Setup(object):
    def __init__(self, load_from=None):
        self.commit(load_from)

    def is_valid_key(self, key):
        return (key == key.upper() and not key.startswith("_"))

    def commit(self, source):
        if source:
            if not hasattr(source, "iteritems"):
                source = vars(source)
            for key, value in source.iteritems():
                if self.is_valid_key(key):
                    setattr(self, key, value)

    def values(self):
        for key, value in self.__dict__.iteritems():
            if self.is_valid_key(key):
                yield (key, value)

def configure():
    setup = Setup()

    from projectname.settings.global_settings import global_configure
    from projectname.settings.site_settings import site_configure
    
    global_configure(setup)
    site_configure(setup)

    try:
        from projectname.settings import local_settings
        setup.commit(local_settings)
    except ImportError:
        pass

    return setup.values()

globals().update(configure())
del configure, Setup

global_settings.py

def global_configure(setup):
  TIME_ZONE = "Europe/Turku"
  LANGUAGES = (("fi", "Suomi"),)
  setup.commit(locals()) # put locals (only CONSTANT_LIKE values) into setup

local_settings.py

OLD_SCHOOL = "y35!" # This will also work (Setup.commit() is able to read modules just as well)

site_settings.py

def global_configure(setup):
  LANGUAGES = getattr(setup, "LANGUAGES", ()) + (("en", "English"),) # Can read values from setup:
  DERP = True # and set new ones like usual
  setup.commit(locals())