def render(self, request):
        """Render this request, from my server.

        This will always be asynchronous, and therefore return NOT_DONE_YET.
        It spins off a request to the pb client, and either adds it to the list
        of pending issues or requests it immediately, depending on if the
        client is already connected.
        """
        if not self.publisher:
            self.pending.append(request)
            if not self.waiting:
                self.waiting = 1
                bf = pb.PBClientFactory()
                timeout = 10
                if self.host == "unix":
                    reactor.connectUNIX(self.port, bf, timeout)
                else:
                    reactor.connectTCP(self.host, self.port, bf, timeout)
                d = bf.getRootObject()
                d.addCallbacks(self.connected, self.notConnected)

        else:
            i = Issue(request)
            self.publisher.callRemote('request', request).addCallbacks(i.finished, i.failed)
        return server.NOT_DONE_YET
Render this request, from my server.

        This will always be asynchronous, and therefore return NOT_DONE_YET.
        It spins off a request to the pb client, and either adds it to the list
        of pending issues or requests it immediately, depending on if the
        client is already connected.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/web/distrib.py