Set config from an :py:class:`argparse.Namespace` object.

        Call this method with the return value from
        :py:meth:`~argparse.ArgumentParser.parse_args`.

        :param argparse.Namespace args: The populated
            :py:class:`argparse.Namespace` object.

def parser_set(self, args):
        """Set config from an :py:class:`argparse.Namespace` object.

        Call this method with the return value from
        :py:meth:`~argparse.ArgumentParser.parse_args`.

        :param argparse.Namespace args: The populated
            :py:class:`argparse.Namespace` object.

        """
        for key, value in vars(args).items():
            self._parser_update(key, value)