Use str.isupper() to test if a string is uppercased.

    def __init__(self, settings_module):

        # update this dict from global settings (but only for ALL_CAPS settings)

        for setting in dir(global_settings):

            if setting == setting.upper():

            if setting.isupper():

                setattr(self, setting, getattr(global_settings, setting))

        # store the settings module in case someone later cares

        tuple_settings = ("INSTALLED_APPS", "TEMPLATE_DIRS")

        for setting in dir(mod):

            if setting == setting.upper():

            if setting.isupper():

                setting_value = getattr(mod, setting)

                if (setting in tuple_settings and