How to use the mechanize._rfc3986.urlsplit function in mechanize

def __init__(self, uri, name, log=False):
        this_dir = os.path.dirname(__file__)
        path = os.path.join(this_dir, "twisted-localserver.py")
        ServerProcess.__init__(self, path, name)
        self.uri = uri
        authority = mechanize._rfc3986.urlsplit(uri)[1]
        host, port = urllib.splitport(authority)
        if port is None:
            port = "80"
        self.port = int(port)
        # def report(msg):
        #     print "%s: %s" % (name, msg)
        report = lambda msg: None
        self.report_hook = report
        self._log = log
        self._start()

def __init__(self, uri, name, log=False):
        this_dir = os.path.dirname(__file__)
        path = os.path.join(this_dir, "twisted-localserver.py")
        ServerProcess.__init__(self, path, name)
        self.uri = uri
        authority = mechanize._rfc3986.urlsplit(uri)[1]
        host, port = mechanize.polyglot.splitport(authority)
        if port is None:
            port = "80"
        self.port = int(port)

        def report(msg):
            pass
        self.report_hook = report
        self._log = log
        self._start()

def get_selector(self):
        scheme, authority, path, query, fragment = _rfc3986.urlsplit(
            self.__r_host)
        if path == "":
            path = "/"  # RFC 2616, section 3.2.2
        fragment = None  # RFC 3986, section 3.5
        return _rfc3986.urlunsplit([scheme, authority, path, query, fragment])

def _mech_open(self,
                   url,
                   data=None,
                   update_history=True,
                   visit=None,
                   timeout=_sockettimeout._GLOBAL_DEFAULT_TIMEOUT):
        try:
            url.get_full_url
        except AttributeError:
            # string URL -- convert to absolute URL if required
            scheme, authority = _rfc3986.urlsplit(url)[:2]
            if scheme is None:
                # relative URL
                if self._response is None:
                    raise BrowserStateError("can't fetch relative reference: "
                                            "not viewing any document")
                url = _rfc3986.urljoin(self._response.geturl(), url)

        request = self._request(url, data, visit, timeout)
        visit = request.visit
        if visit is None:
            visit = True

        if visit:
            self._visit_request(request, update_history)

        success = True

def _mech_open(self,
                   url,
                   data=None,
                   update_history=True,
                   visit=None,
                   timeout=_sockettimeout._GLOBAL_DEFAULT_TIMEOUT):
        try:
            url.get_full_url
        except AttributeError:
            # string URL -- convert to absolute URL if required
            scheme, authority = _rfc3986.urlsplit(url)[:2]
            if scheme is None:
                # relative URL
                if self._response is None:
                    raise BrowserStateError("can't fetch relative reference: "
                                            "not viewing any document")
                url = _rfc3986.urljoin(self._response.geturl(), url)

        request = self._request(url, data, visit, timeout)
        visit = request.visit
        if visit is None:
            visit = True

        if visit:
            self._visit_request(request, update_history)

        success = True