How to use the keystonemiddleware.openstack.common.gettextutils.Message function in keystonemiddleware

level=level,
                                      max_depth=max_depth)
        if isinstance(value, dict):
            return dict((k, recursive(v)) for k, v in six.iteritems(value))
        elif isinstance(value, (list, tuple)):
            return [recursive(lv) for lv in value]

        # It's not clear why xmlrpclib created their own DateTime type, but
        # for our purposes, make it a datetime type which is explicitly
        # handled
        if isinstance(value, xmlrpclib.DateTime):
            value = datetime.datetime(*tuple(value.timetuple())[:6])

        if convert_datetime and isinstance(value, datetime.datetime):
            return timeutils.strtime(value)
        elif isinstance(value, gettextutils.Message):
            return value.data
        elif hasattr(value, 'iteritems'):
            return recursive(dict(value.iteritems()), level=level + 1)
        elif hasattr(value, '__iter__'):
            return recursive(list(value))
        elif convert_instances and hasattr(value, '__dict__'):
            # Likely an instance of something. Watch for cycles.
            # Ignore class member vars.
            return recursive(value.__dict__, level=level + 1)
        elif netaddr and isinstance(value, netaddr.IPAddress):
            return six.text_type(value)
        else:
            if any(test(value) for test in _nasty_type_tests):
                return six.text_type(value)
            return value
    except TypeError:

def f(msg):
            """oslo.i18n.gettextutils translation function."""
            if USE_LAZY:
                return Message(msg, domain=domain)
            return m(msg)
        return f

domain='keystonemiddleware', *args):
        """Create a new Message object.

        In order for translation to work gettext requires a message ID, this
        msgid will be used as the base unicode text. It is also possible
        for the msgid and the base unicode text to be different by passing
        the msgtext parameter.
        """
        # If the base msgtext is not given, we use the default translation
        # of the msgid (which is in English) just in case the system locale is
        # not English, so that the base text will be in that locale by default.
        if not msgtext:
            msgtext = Message._translate_msgid(msgid, domain)
        # We want to initialize the parent unicode with the actual object that
        # would have been plain unicode if 'Message' was not enabled.
        msg = super(Message, cls).__new__(cls, msgtext)
        msg.msgid = msgid
        msg.domain = domain
        msg.params = params
        return msg

def __new__(cls, msgid, msgtext=None, params=None,
                domain='keystonemiddleware', *args):
        """Create a new Message object.

        In order for translation to work gettext requires a message ID, this
        msgid will be used as the base unicode text. It is also possible
        for the msgid and the base unicode text to be different by passing
        the msgtext parameter.
        """
        # If the base msgtext is not given, we use the default translation
        # of the msgid (which is in English) just in case the system locale is
        # not English, so that the base text will be in that locale by default.
        if not msgtext:
            msgtext = Message._translate_msgid(msgid, domain)
        # We want to initialize the parent unicode with the actual object that
        # would have been plain unicode if 'Message' was not enabled.
        msg = super(Message, cls).__new__(cls, msgtext)
        msg.msgid = msgid
        msg.domain = domain
        msg.params = params
        return msg

If the object is not translatable it is returned as-is.
    If the locale is None the object is translated to the system locale.

    :param obj: the object to translate
    :param desired_locale: the locale to translate the message to, if None the
                           default system locale will be used
    :returns: the translated object in unicode, or the original object if
              it could not be translated
    """
    message = obj
    if not isinstance(message, Message):
        # If the object to translate is not already translatable,
        # let's first get its unicode representation
        message = six.text_type(obj)
    if isinstance(message, Message):
        # Even after unicoding() we still need to check if we are
        # running with translatable unicode before translating
        return message.translate(desired_locale)
    return obj

def __mod__(self, other):
        # When we mod a Message we want the actual operation to be performed
        # by the parent class (i.e. unicode()), the only thing  we do here is
        # save the original msgid and the parameters in case of a translation
        params = self._sanitize_mod_params(other)
        unicode_mod = super(Message, self).__mod__(params)
        modded = Message(self.msgid,
                         msgtext=unicode_mod,
                         params=params,
                         domain=self.domain)
        return modded