How to use the owslib.util.nspath function in OWSLib

#  PyWPS Process v.net.path successfully calculated
        # 
        # OR
        # 
        #  
        #   
        #    
        #     Attribute null not found in feature collection
        #    
        #   
        #  
        # 
        statusEl = root.find(nspath('Status/*', ns=wpsns))
        self.status = statusEl.tag.split('}')[1]
        # creationTime attribute
        element = root.find(nspath('Status', ns=wpsns))
        self.creationTime = testXMLAttribute(element, 'creationTime')
        # get progress info
        if self.status == 'ProcessSucceeded':
            self.percentCompleted = 100
        else:
            try:
                percentCompleted = int(statusEl.get('percentCompleted'))
                self.percentCompleted = percentCompleted
            except Exception:
                pass
        # get status message
        self.statusMessage = statusEl.text
        # exceptions ?
        for element in statusEl:
            if element.tag.endswith('ExceptionReport'):
                self._parseExceptionReport(element)

address = elem.find(nspath('ContactAddress', WMS_NAMESPACE))
        if address is not None:
            street = address.find(nspath('Address', WMS_NAMESPACE))
            if street is not None:
                self.address = street.text

            city = address.find(nspath('City', WMS_NAMESPACE))
            if city is not None:
                self.city = city.text

            region = address.find(nspath('StateOrProvince', WMS_NAMESPACE))
            if region is not None:
                self.region = region.text

            postcode = address.find(nspath('PostCode', WMS_NAMESPACE))
            if postcode is not None:
                self.postcode = postcode.text

            country = address.find(nspath('Country', WMS_NAMESPACE))
            if country is not None:
                self.country = country.text

        organization = elem.find(nspath('ContactPersonPrimary/ContactOrganization', WMS_NAMESPACE))
        if organization is not None:
            self.organization = organization.text
        else:
            self.organization = None

        position = elem.find(nspath('ContactPosition', WMS_NAMESPACE))
        if position is not None:
            self.position = position.text

def __init__(self, elem, parent):
        """."""
        self.id = elem.find(nspath('Name',ns=WFS_NAMESPACE)).text
        self.title = elem.find(nspath('Title',ns=WFS_NAMESPACE)).text
        abstract = elem.find(nspath('Abstract',ns=WFS_NAMESPACE))
        if abstract is not None:
            self.abstract = abstract.text
        else:
            self.abstract = None
        self.keywords = [f.text for f in elem.findall(nspath('Keywords',ns=WFS_NAMESPACE))]

        # bboxes
        self.boundingBox = None
        b = elem.find(nspath('BoundingBox',ns=WFS_NAMESPACE))
        if b is not None:
            self.boundingBox = (float(b.attrib['minx']),float(b.attrib['miny']),
                    float(b.attrib['maxx']), float(b.attrib['maxy']),
                    b.attrib['SRS'])
        self.boundingBoxWGS84 = None
        b = elem.find(nspath('LatLongBoundingBox',ns=WFS_NAMESPACE))
        if b is not None:
            self.boundingBoxWGS84 = (
                    float(b.attrib['minx']),float(b.attrib['miny']),
                    float(b.attrib['maxx']), float(b.attrib['maxy']),
                    )
        # crs options
        self.crsOptions = [srs.text for srs in elem.findall(nspath('SRS'))]

        # verbs
        self.verbOptions = [op.tag for op \

def __init__(self, root):
        self.code = root.attrib.get("exceptionCode", None)
        self.locator = root.attrib.get("locator", None)
        textEl = root.find(nspath('ExceptionText', ns=getNamespace(root)))
        if textEl is not None:
            self.text = textEl.text
        else:
            self.text = ""

val = self._root.find(util.nspath('ProviderSite', namespace))
        if val is not None:
            self.site = util.testXMLValue(val.attrib.get(util.nspath('href', XLINK_NAMESPACE)), True)
        else:
            self.site = None

        val = self._root.find(util.nspath('ServiceContact/Role', namespace))
        self.role = util.testXMLValue(val)

        val = self._root.find(util.nspath('ServiceContact/IndividualName', namespace))
        self.name = util.testXMLValue(val)
    
        val = self._root.find(util.nspath('ServiceContact/PositionName', namespace))
        self.position = util.testXMLValue(val)
 
        val = self._root.find(util.nspath('ServiceContact/ContactInfo/Phone/Voice', namespace))
        self.phone = util.testXMLValue(val)
    
        val = self._root.find(util.nspath('ServiceContact/ContactInfo/Phone/Facsimile', namespace))
        self.fax = util.testXMLValue(val)
    
        val = self._root.find(util.nspath('ServiceContact/ContactInfo/Address/DeliveryPoint', namespace))
        self.address = util.testXMLValue(val)
    
        val = self._root.find(util.nspath('ServiceContact/ContactInfo/Address/City', namespace))
        self.city = util.testXMLValue(val)
    
        val = self._root.find(util.nspath('ServiceContact/ContactInfo/Address/AdministrativeArea', namespace))
        self.region = util.testXMLValue(val)
    
        val = self._root.find(util.nspath('ServiceContact/ContactInfo/Address/PostalCode', namespace))
        self.postcode = util.testXMLValue(val)

# verbs
        self.verbOptions = [op.tag for op \
            in parent.findall(nspath('Operations/*',ns=WFS_NAMESPACE))]
        self.verbOptions + [op.tag for op \
            in elem.findall(nspath('Operations/*',ns=WFS_NAMESPACE)) \
            if op.tag not in self.verbOptions]

        #others not used but needed for iContentMetadata harmonisation
        self.styles=None
        self.timepositions=None
        self.defaulttimeposition=None

        # MetadataURLs
        self.metadataUrls = []
        for m in elem.findall(nspath('MetadataURL', ns=WFS_NAMESPACE)):
            metadataUrl = {
                'url': testXMLValue(m.attrib['{http://www.w3.org/1999/xlink}href'], attrib=True)
            }
            self.metadataUrls.append(metadataUrl)

        if parse_remote_metadata:
            self.parse_remote_metadata(timeout)

def __init__(self, elem, parent):
        """."""
        self.id = elem.find(nspath('Name',ns=WFS_NAMESPACE)).text
        self.title = elem.find(nspath('Title',ns=WFS_NAMESPACE)).text
        abstract = elem.find(nspath('Abstract',ns=WFS_NAMESPACE))
        if abstract is not None:
            self.abstract = abstract.text
        else:
            self.abstract = None
        self.keywords = [f.text for f in elem.findall(nspath('Keywords',ns=WFS_NAMESPACE))]

        # bboxes
        self.boundingBox = None
        b = elem.find(nspath('BoundingBox',ns=WFS_NAMESPACE))
        if b is not None:
            self.boundingBox = (float(b.attrib['minx']),float(b.attrib['miny']),
                    float(b.attrib['maxx']), float(b.attrib['maxy']),
                    b.attrib['SRS'])
        self.boundingBoxWGS84 = None
        b = elem.find(nspath('LatLongBoundingBox',ns=WFS_NAMESPACE))
        if b is not None:
            self.boundingBoxWGS84 = (
                    float(b.attrib['minx']),float(b.attrib['miny']),
                    float(b.attrib['maxx']), float(b.attrib['maxy']),
                    )
        # crs options

def __init__(self, elem, namespace=DEFAULT_OWS_NAMESPACE):
        self.url = None
        self.title = None
        self.role = None

        if elem is not None:
            urlattrib = elem.attrib.get(nspath('href', XLINK_NAMESPACE))
            if urlattrib is not None:
                self.url = testXMLValue(urlattrib, True)
            titleattrib = elem.attrib.get(nspath('title', XLINK_NAMESPACE))
            if titleattrib is not None:
                self.title = testXMLValue(titleattrib, True)
            roleattrib = elem.attrib.get(nspath('role', XLINK_NAMESPACE))
            if roleattrib is not None:
                self.role = testXMLValue(roleattrib, True)

# xmlns:ows="http://www.opengis.net/ows/1.1"
        # xmlns:xlink="http://www.w3.org/1999/xlink">
        if len(self.dataInputs) > 0:
            log.debug('clean data inputs')
            self.dataInputs[:] = []
        for inputElement in root.findall(nspath('DataInputs/Input', ns=wpsns)):
            self.dataInputs.append(Output(inputElement))
            if self.verbose is True:
                dump(self.dataInputs[-1])

        # 
        # xmlns:ns="http://www.opengis.net/wps/1.0.0"
        if len(self.processOutputs) > 0:
            log.debug('clean process outputs')
            self.processOutputs[:] = []
        for outputElement in root.findall(nspath('ProcessOutputs/Output', ns=wpsns)):
            self.processOutputs.append(Output(outputElement))
            if self.verbose is True:
                dump(self.processOutputs[-1])

style['legend'] = legend.attrib['{http://www.w3.org/1999/xlink}href']

            lgd = s.find(nspath('LegendURL', WMS_NAMESPACE))
            if lgd is not None:
                if 'width' in lgd.attrib.keys():
                    style['legend_width'] = lgd.attrib.get('width')
                if 'height' in lgd.attrib.keys():
                    style['legend_height'] = lgd.attrib.get('height')

                lgd_format = lgd.find(nspath('Format', WMS_NAMESPACE))
                if lgd_format is not None:
                    style['legend_format'] = lgd_format.text.strip()
            self.styles[name.text] = style

        # keywords
        self.keywords = [f.text for f in elem.findall(nspath('KeywordList/Keyword', WMS_NAMESPACE))]

        # extents replaced by dimensions of name
        # comment by Soren Scott
        # 500, 490, 480
        # it can be repeated with the same name so ? this assumes a single one to match 1.1.1

        self.timepositions = None
        self.defaulttimeposition = None
        time_dimension = None

        for dim in elem.findall(nspath('Dimension', WMS_NAMESPACE)):
            dim_name = dim.attrib.get('name')
            if dim_name is not None and dim_name.lower() == 'time':
                time_dimension = dim
        if time_dimension is not None: