Property to return the variable defined in ``django.conf.settings``.

        Returns:
            object: the variable defined in ``django.conf.settings``.

        Raises:
            AttributeError: if the variable is missing.
            KeyError: if the item is missing from nested setting.

def raw_value(self):
        """
        Property to return the variable defined in ``django.conf.settings``.

        Returns:
            object: the variable defined in ``django.conf.settings``.

        Raises:
            AttributeError: if the variable is missing.
            KeyError: if the item is missing from nested setting.
        """
        if self.parent_setting is not None:
            return self.parent_setting.raw_value[self.full_name]
        else:
            return getattr(settings, self.full_name)