How to use the pycsw.core.util.bbox2wktpolygon function in pycsw

def test_bbox2wktpolygon(bbox, expected):
    result = util.bbox2wktpolygon(bbox)
    assert result == expected

_set(
            context,
            recobj,
            'pycsw:AnyText',
             util.get_anytext([
                 md.contents[layer].title,
                 md.contents[layer].abstract,
                 ','.join(keywords)
             ])
        )

        bbox = md.contents[layer].boundingBoxWGS84

        if bbox is not None:
            tmp = '%s,%s,%s,%s' % (bbox[0], bbox[1], bbox[2], bbox[3])
            _set(context, recobj, 'pycsw:BoundingBox', util.bbox2wktpolygon(tmp))
            _set(context, recobj, 'pycsw:CRS', 'urn:ogc:def:crs:EPSG:6.11:4326')
            _set(context, recobj, 'pycsw:DistanceUOM', 'degrees')
        else:
            bbox = md.contents[layer].boundingBox
            if bbox:
                tmp = '%s,%s,%s,%s' % (bbox[0], bbox[1], bbox[2], bbox[3])
                _set(context, recobj, 'pycsw:BoundingBox', util.bbox2wktpolygon(tmp))
                _set(context, recobj, 'pycsw:CRS', 'urn:ogc:def:crs:EPSG:6.11:%s' % \
                bbox[-1].split(':')[1])


        params = {
            'service': 'WMTS',
            'version': '1.0.0',
            'request': 'GetTile',
            'layer': md.contents[layer].name,

md.contents[layer].abstract,
                ','.join(md.contents[layer].keywords)
            ])
        )

        bbox = md.contents[layer].boundingBoxWGS84
        if bbox is not None:
            tmp = '%s,%s,%s,%s' % (bbox[0], bbox[1], bbox[2], bbox[3])
            _set(context, recobj, 'pycsw:BoundingBox', util.bbox2wktpolygon(tmp))
            _set(context, recobj, 'pycsw:CRS', 'urn:ogc:def:crs:EPSG:6.11:4326')
            _set(context, recobj, 'pycsw:DistanceUOM', 'degrees')
        else:
            bbox = md.contents[layer].boundingBox
            if bbox:
                tmp = '%s,%s,%s,%s' % (bbox[0], bbox[1], bbox[2], bbox[3])
                _set(context, recobj, 'pycsw:BoundingBox', util.bbox2wktpolygon(tmp))
                _set(context, recobj, 'pycsw:CRS', 'urn:ogc:def:crs:EPSG:6.11:%s' % \
                bbox[-1].split(':')[1])

        times = md.contents[layer].timepositions
        if times is not None:  # get temporal extent
            time_begin = time_end = None
            if len(times) == 1 and len(times[0].split('/')) > 1:
                time_envelope = times[0].split('/')
                time_begin = time_envelope[0]
                time_end = time_envelope[1]
            elif len(times) > 1:  # get first/last
                time_begin = times[0]
                time_end = times[-1]
            if all([time_begin is not None, time_end is not None]):
                _set(context, recobj, 'pycsw:TempExtent_begin', time_begin)
                _set(context, recobj, 'pycsw:TempExtent_end', time_end)

for ref in md.references:
        tmp = ',,%s,%s' % (ref['scheme'], ref['url'])
        links.append(tmp)
    for uri in md.uris:
        tmp = '%s,%s,%s,%s' % \
        (uri['name'], uri['description'], uri['protocol'], uri['url'])
        links.append(tmp)

    if len(links) > 0:
        _set(context, recobj, 'pycsw:Links', '^'.join(links))

    if bbox is not None:
        try:
            tmp = '%s,%s,%s,%s' % (bbox.minx, bbox.miny, bbox.maxx, bbox.maxy)
            _set(context, recobj, 'pycsw:BoundingBox', util.bbox2wktpolygon(tmp))
        except:  # coordinates are corrupted, do not include
            _set(context, recobj, 'pycsw:BoundingBox', None)
    else:
        _set(context, recobj, 'pycsw:BoundingBox', None)

    return recobj

for link in md.idinfo.citation.citeinfo['onlink']:
                    tmp = ',,,%s' % link
                    links.append(tmp)

    if hasattr(md, 'distinfo') and hasattr(md.distinfo, 'stdorder'):
        for link in md.distinfo.stdorder['digform']:
            tmp = ',%s,,%s' % (link['name'], link['url'])
            links.append(tmp)

    if len(links) > 0:
        _set(context, recobj, 'pycsw:Links', '^'.join(links))

    if bbox is not None:
        try:
            tmp = '%s,%s,%s,%s' % (bbox.minx, bbox.miny, bbox.maxx, bbox.maxy)
            _set(context, recobj, 'pycsw:BoundingBox', util.bbox2wktpolygon(tmp))
        except:  # coordinates are corrupted, do not include
            _set(context, recobj, 'pycsw:BoundingBox', None)
    else:
        _set(context, recobj, 'pycsw:BoundingBox', None)

    return recobj

for link in md.idinfo.citation.citeinfo['onlink']:
                    tmp = ',,,%s' % link
                    links.append(tmp)

    if hasattr(md, 'distinfo') and hasattr(md.distinfo, 'stdorder'):
        for link in md.distinfo.stdorder['digform']:
            tmp = ',%s,,%s' % (link['name'], link['url'])
            links.append(tmp)

    if len(links) > 0:
        _set(context, recobj, 'pycsw:Links', '^'.join(links))

    if bbox is not None:
        try:
            tmp = '%s,%s,%s,%s' % (bbox.minx, bbox.miny, bbox.maxx, bbox.maxy)
            _set(context, recobj, 'pycsw:BoundingBox', util.bbox2wktpolygon(tmp))
        except:  # coordinates are corrupted, do not include
            _set(context, recobj, 'pycsw:BoundingBox', None)
    else:
        _set(context, recobj, 'pycsw:BoundingBox', None)

    return recobj

for ref in md.references:
        tmp = ',,%s,%s' % (ref['scheme'], ref['url'])
        links.append(tmp)
    for uri in md.uris:
        tmp = '%s,%s,%s,%s' % \
        (uri['name'], uri['description'], uri['protocol'], uri['url'])
        links.append(tmp)

    if len(links) > 0:
        _set(context, recobj, 'pycsw:Links', '^'.join(links))

    if bbox is not None:
        try:
            tmp = '%s,%s,%s,%s' % (bbox.minx, bbox.miny, bbox.maxx, bbox.maxy)
            _set(context, recobj, 'pycsw:BoundingBox', util.bbox2wktpolygon(tmp))
        except:  # coordinates are corrupted, do not include
            _set(context, recobj, 'pycsw:BoundingBox', None)
    else:
        _set(context, recobj, 'pycsw:BoundingBox', None)

    return recobj

A sequence of strings containing Well-Known Text representations of
        polygons

    Returns
    -------
    str
        Well-Known Text representation of the aggregated bounding box for
        all the input polygons
    """

    try:
        multi_pol = MultiPolygon(
            [loads(bbox) for bbox in bboxs]
        )
        bstr = ",".join(["{0:.2f}".format(b) for b in multi_pol.bounds])
        return util.bbox2wktpolygon(bstr)
    except Exception as err:
        raise RuntimeError('Cannot aggregate polygons: %s' % str(err))

_set(context, serviceobj, 'pycsw:Abstract', md.identification.abstract)
    _set(context, serviceobj, 'pycsw:Keywords', ','.join(md.identification.keywords))
    _set(context, serviceobj, 'pycsw:Creator', md.provider.contact.name)
    _set(context, serviceobj, 'pycsw:Publisher', md.provider.name)
    _set(context, serviceobj, 'pycsw:Contributor', md.provider.contact.name)
    _set(context, serviceobj, 'pycsw:OrganizationName', md.provider.contact.name)
    _set(context, serviceobj, 'pycsw:AccessConstraints', md.identification.accessconstraints)
    _set(context, serviceobj, 'pycsw:OtherConstraints', md.identification.fees)
    _set(context, serviceobj, 'pycsw:Source', record)
    _set(context, serviceobj, 'pycsw:Format', md.identification.type)

    for c in md.contents:
        if md.contents[c].parent is None:
            bbox = md.contents[c].boundingBoxWGS84
            tmp = '%s,%s,%s,%s' % (bbox[0], bbox[1], bbox[2], bbox[3])
            _set(context, serviceobj, 'pycsw:BoundingBox', util.bbox2wktpolygon(tmp))
            break
    _set(context, serviceobj, 'pycsw:CRS', 'urn:ogc:def:crs:EPSG:6.11:4326')
    _set(context, serviceobj, 'pycsw:DistanceUOM', 'degrees')
    _set(context, serviceobj, 'pycsw:ServiceType', 'OGC:WMTS')
    _set(context, serviceobj, 'pycsw:ServiceTypeVersion', md.identification.version)
    _set(context, serviceobj, 'pycsw:Operation', ','.join([d.name for d in md.operations]))
    _set(context, serviceobj, 'pycsw:OperatesOn', ','.join(list(md.contents)))
    _set(context, serviceobj, 'pycsw:CouplingType', 'tight')

    links = [
        '%s,OGC-WMTS Web Map Service,OGC:WMTS,%s' % (identifier, md.url),
    ]

    _set(context, serviceobj, 'pycsw:Links', '^'.join(links))
    _set(context, serviceobj, 'pycsw:XML', caps2iso(serviceobj, md, context))