How to use the pywemo.ouimeaux_device.api.xsd.device.parseString function in pywemo

def __init__(self, url, mac, rediscovery_enabled=True):
        """Create a WeMo device."""
        self._state = None
        self.basic_state_params = {}
        base_url = url.rsplit('/', 1)[0]
        parsed_url = urlparse(url)
        self.host = parsed_url.hostname
        self.port = parsed_url.port
        self.retrying = False
        self.mac = mac
        self.rediscovery_enabled = rediscovery_enabled
        xml = requests.get(url, timeout=10)
        self._config = deviceParser.parseString(xml.content).device
        service_list = self._config.serviceList
        self.services = {}
        for svc in service_list.service:
            svcname = svc.get_serviceType().split(':')[-2]
            service = Service(self, svc, base_url)
            service.eventSubURL = base_url + svc.get_eventSubURL()
            self.services[svcname] = service
            setattr(self, svcname, service)

def device_from_description(description_url, mac, rediscovery_enabled=True):
    """Return object representing WeMo device running at host, else None."""
    xml = requests.get(description_url, timeout=10)
    uuid = deviceParser.parseString(xml.content).device.UDN
    device_mac = mac or deviceParser.parseString(xml.content).device.macAddress

    if device_mac is None:
        LOG.debug(
            'No MAC address was supplied or found in setup xml at: %s.',
            description_url)

    return device_from_uuid_and_location(
        uuid, device_mac, description_url,
        rediscovery_enabled=rediscovery_enabled)

def device_from_host(host):
    """ Returns object representing WeMo device running at host, else None. """
    xml_url = "http://{}:49153/setup.xml".format(host)

    try:
        xml = requests.get(xml_url, timeout=10)

        uuid = deviceParser.parseString(xml.content).device.UDN

        return device_from_uuid_and_location(uuid, xml_url)

    except Exception:  # pylint: disable=broad-except
        return None

def device_from_description(description_url, mac, rediscovery_enabled=True):
    """Return object representing WeMo device running at host, else None."""
    xml = requests.get(description_url, timeout=10)
    uuid = deviceParser.parseString(xml.content).device.UDN
    device_mac = mac or deviceParser.parseString(xml.content).device.macAddress

    if device_mac is None:
        LOG.debug(
            'No MAC address was supplied or found in setup xml at: %s.',
            description_url)

    return device_from_uuid_and_location(
        uuid, device_mac, description_url,
        rediscovery_enabled=rediscovery_enabled)