How to use the ipwb.replay.RegexConverter function in ipwb

fields = line.split(' ', 2)
            dt14 = fields[1]
            dtrfc1123 = ipwbConfig.datetimeToRFC1123(fields[1])
            msg += ('<li><a href="/{1}/{0}">{0} at {2}</a></li>'
                    .format(unsurt(fields[0]), dt14, dtrfc1123))
        msg += ''
    return Response(msg)


class RegexConverter(BaseConverter):
    def __init__(self, url_map, *items):
        super(RegexConverter, self).__init__(url_map)
        self.regex = items[0]


app.url_map.converters['regex'] = RegexConverter


@app.route('/memento//')
def showMemento(urir, datetime):
    """ Request a URI-R at a supplied datetime from the CDXJ """
    urir = getCompleteURI(urir)

    if ipwbConfig.isLocalHosty(urir):
        urir = urir.split('/', 4)[4]
    s = surt.surt(urir, path_strip_trailing_slash_unless_empty=False)
    indexPath = ipwbConfig.getIPWBReplayIndexPath()

    print('Getting CDXJ Lines with the URI-R {0} from {1}'
          .format(urir, indexPath))
    cdxjLinesWithURIR = getCDXJLinesWithURIR(urir, indexPath)

msg += ('<li><a href="/memento/{1}/{0}">{0} at {2}</a></li>'
                    .format(unsurt(fields[0]), dt14, dtrfc1123))
        msg += ''
    else:  # No captures for URI-R
        msg = generateNoMementosInterface_noDatetime(urir)

    return Response(msg)


class RegexConverter(BaseConverter):
    def __init__(self, url_map, *items):
        super(RegexConverter, self).__init__(url_map)
        self.regex = items[0]


app.url_map.converters['regex'] = RegexConverter


def resolveMemento(urir, datetime):
    """ Request a URI-R at a supplied datetime from the CDXJ """
    urir = getCompleteURI(urir)

    if ipwbUtils.isLocalHosty(urir):
        urir = urir.split('/', 4)[4]
    s = surt.surt(urir, path_strip_trailing_slash_unless_empty=False)
    indexPath = ipwbUtils.getIPWBReplayIndexPath()

    print('Getting CDXJ Lines with the URI-R {0} from {1}'
          .format(urir, indexPath))
    cdxjLinesWithURIR = getCDXJLinesWithURIR(urir, indexPath)

    closestLine = getCDXJLineClosestTo(datetime, cdxjLinesWithURIR)

def __init__(self, url_map, *items):
        super(RegexConverter, self).__init__(url_map)
        self.regex = items[0]

def __init__(self, url_map, *items):
        super(RegexConverter, self).__init__(url_map)
        self.regex = items[0]