How to use the xmltodict.expat.ExpatError function in xmltodict

raise ResponseEmpty(params.messages.no_output)

            if "rt" not in parsed_base["route-table"]:
                raise ResponseEmpty(params.messages.no_output)

            parsed = parsed_base["route-table"]

            validated = JuniperRoute(**parsed)
            serialized = validated.serialize().export_dict()

            if i == 0:
                data.update(serialized)
            else:
                data["routes"].extend(serialized["routes"])

        except xmltodict.expat.ExpatError as err:
            log.critical(str(err))
            raise ParsingError("Error parsing response data")

        except KeyError as err:
            log.critical(f"'{str(err)}' was not found in the response")
            raise ParsingError("Error parsing response data")

        except ValidationError as err:
            log.critical(str(err))
            raise ParsingError(validation_error_message(*err.errors()))

    return data

def deserialize_reply(xml, update_time=False):
    """
    反序列化被动回复
    :param xml: 待反序列化的xml
    :param update_time: 是否用当前时间替换xml中的时间
    :raises ValueError: 不能辨识的reply xml
    :rtype: wechatpy.replies.BaseReply
    """
    if not xml:
        return EmptyReply()

    try:
        reply_dict = xmltodict.parse(xml)["xml"]
        msg_type = reply_dict["MsgType"]
    except (xmltodict.expat.ExpatError, KeyError):
        raise ValueError("bad reply xml")
    if msg_type not in REPLY_TYPES:
        raise ValueError("unknown reply type")

    cls = REPLY_TYPES[msg_type]
    kwargs = dict()
    for attr, field in cls._fields.items():
        if field.name in reply_dict:
            str_value = reply_dict[field.name]
            kwargs[attr] = field.from_xml(str_value)

    if update_time:
        kwargs["time"] = time.time()

    return cls(**kwargs)

def post_xml(url, data, cert=None):
        """Post data is xml."""
        result = requests.post(url, data=data.encode(), cert=cert)
        result.encoding = 'utf-8'

        try:
            result = dict(parse(result.text).get('xml'))
        except expat.ExpatError:
            result = result.text

        return result