How to use the pycsw.core.util.wkt2geom function in pycsw

def test_wkt2geom(wkt, bounds, expected):
    result = util.wkt2geom(wkt, bounds=bounds)
    assert result == expected

def write_boundingbox(bbox, nsmap):
    ''' Generate ows20:BoundingBox '''

    if bbox is not None:
        try:
            bbox2 = util.wkt2geom(bbox)
        except:
            return None

        if len(bbox2) == 4:
            boundingbox = etree.Element(util.nspath_eval('ows20:BoundingBox',
            nsmap), crs='http://www.opengis.net/def/crs/EPSG/0/4326',
            dimensions='2')

            etree.SubElement(boundingbox, util.nspath_eval('ows20:LowerCorner',
            nsmap)).text = '%s %s' % (bbox2[1], bbox2[0])

            etree.SubElement(boundingbox, util.nspath_eval('ows20:UpperCorner',
            nsmap)).text = '%s %s' % (bbox2[3], bbox2[2])

            return boundingbox
        else:

def record_to_dict(record):
    # Encodes record title if it is not empty.
    if record.title:
        record.title = record.title.encode('ascii', 'ignore').decode('utf-8')

    bbox = wkt2geom(record.wkt_geometry)
    min_x, min_y, max_x, max_y = bbox[0], bbox[1], bbox[2], bbox[3]

    record_dict = {
        'title': record.title,
        'abstract': record.abstract,
        'title_alternate': record.title_alternate,
        'checks_list': [],
        'bbox': bbox,
        'min_x': min_x,
        'min_y': min_y,
        'max_x': max_x,
        'max_y': max_y,
        'source': record.source,
        'source_type': record.type,
        'tile_url': '/layer/%s/wmts/%s/default_grid/{z}/{x}/{y}.png' % (record.identifier, record.title_alternate),
        'layer_date': record.date_modified,

def write_extent(bbox, nsmap):
    ''' Generate BBOX extent '''

    from shapely.wkt import loads

    if bbox is not None:
        try:
            bbox2 = util.wkt2geom(bbox)
        except:
            return None
        extent = etree.Element(util.nspath_eval('dif:Spatial_Coverage', nsmap))
        etree.SubElement(extent, util.nspath_eval('dif:Southernmost_Latitude', nsmap)).text = str(bbox2[1])
        etree.SubElement(extent, util.nspath_eval('dif:Northernmost_Latitude', nsmap)).text = str(bbox2[3])
        etree.SubElement(extent, util.nspath_eval('dif:Westernmost_Longitude', nsmap)).text = str(bbox2[0])
        etree.SubElement(extent, util.nspath_eval('dif:Easternmost_Longitude', nsmap)).text = str(bbox2[2])
        return extent
    return None

def write_extent(bbox, nsmap):
    ''' Generate BBOX extent '''
    
    if bbox is not None:
        try:
            bbox2 = util.wkt2geom(bbox)
        except:
            return None
        bounding_box = etree.Element(util.nspath_eval('gm03:GM03_2_1Core.Core.EX_GeographicBoundingBox', NAMESPACES))
        etree.SubElement(bounding_box, util.nspath_eval('gm03:northBoundLatitude', nsmap)).text = str(bbox2[3])
        etree.SubElement(bounding_box, util.nspath_eval('gm03:southBoundLatitude', nsmap)).text = str(bbox2[1])
        etree.SubElement(bounding_box, util.nspath_eval('gm03:eastBoundLongitude', nsmap)).text = str(bbox2[0])
        etree.SubElement(bounding_box, util.nspath_eval('gm03:westBoundLongitude', nsmap)).text = str(bbox2[2])
        return bounding_box
    return None

def write_extent(bbox):
    ''' Generate BBOX extent '''

    if bbox is not None:
        try:
            bbox2 = util.wkt2geom(bbox)
        except:
            return None

        spdom = etree.Element('spdom')
        bounding = etree.SubElement(spdom, 'bounding')
        etree.SubElement(bounding, 'westbc').text = str(bbox2[0])
        etree.SubElement(bounding, 'eastbc').text = str(bbox2[2])
        etree.SubElement(bounding, 'northbc').text = str(bbox2[3])
        etree.SubElement(bounding, 'southbc').text = str(bbox2[1])
        return spdom
    return None

def write_extent(bbox, nsmap):
    ''' Generate BBOX extent '''

    if bbox is not None:
        try:
            bbox2 = util.wkt2geom(bbox)
        except:
            return None
        where = etree.Element(util.nspath_eval('georss:where', NAMESPACES))
        envelope = etree.SubElement(where, util.nspath_eval('gml:Envelope', nsmap), srsName='http://www.opengis.net/def/crs/EPSG/0/4326')
        etree.SubElement(envelope, util.nspath_eval('gml:lowerCorner', nsmap)).text = '%s %s' % (bbox2[1], bbox2[0])
        etree.SubElement(envelope, util.nspath_eval('gml:upperCorner', nsmap)).text = '%s %s' % (bbox2[3], bbox2[2])

        return where
    return None

def write_boundingbox(bbox, nsmap):
    ''' Generate ows:BoundingBox '''

    if bbox is not None:
        try:
            bbox2 = util.wkt2geom(bbox)
        except:
            return None

        if len(bbox2) == 4:
            boundingbox = etree.Element(util.nspath_eval('ows:BoundingBox',
            nsmap), crs='urn:x-ogc:def:crs:EPSG:6.11:4326',
            dimensions='2')

            etree.SubElement(boundingbox, util.nspath_eval('ows:LowerCorner',
            nsmap)).text = '%s %s' % (bbox2[1], bbox2[0])

            etree.SubElement(boundingbox, util.nspath_eval('ows:UpperCorner',
            nsmap)).text = '%s %s' % (bbox2[3], bbox2[2])

            return boundingbox
        else:

def write_extent(bbox, nsmap):
    ''' Generate BBOX extent '''

    if bbox is not None:
        try:
            bbox2 = util.wkt2geom(bbox)
        except:
            return None
        extent = etree.Element(util.nspath_eval('gmd:extent', nsmap))
        ex_extent = etree.SubElement(extent, util.nspath_eval('gmd:EX_Extent', nsmap))
        ge = etree.SubElement(ex_extent, util.nspath_eval('gmd:geographicElement', nsmap))
        gbb = etree.SubElement(ge, util.nspath_eval('gmd:EX_GeographicBoundingBox', nsmap))
        west = etree.SubElement(gbb, util.nspath_eval('gmd:westBoundLongitude', nsmap))
        east = etree.SubElement(gbb, util.nspath_eval('gmd:eastBoundLongitude', nsmap))
        south = etree.SubElement(gbb, util.nspath_eval('gmd:southBoundLatitude', nsmap))
        north = etree.SubElement(gbb, util.nspath_eval('gmd:northBoundLatitude', nsmap))

        etree.SubElement(west, util.nspath_eval('gco:Decimal', nsmap)).text = str(bbox2[0])
        etree.SubElement(south, util.nspath_eval('gco:Decimal', nsmap)).text = str(bbox2[1])
        etree.SubElement(east, util.nspath_eval('gco:Decimal', nsmap)).text = str(bbox2[2])
        etree.SubElement(north, util.nspath_eval('gco:Decimal', nsmap)).text = str(bbox2[3])
        return extent