new pattern for handling the redis results

server.py

@@ -28,7 +28,9 @@ async def server(websocket, path):
 
     mpsc = Receiver(loop=loop)
     async def reader(mpsc):
+        print('foo', flush=True)
         async for channel, msg in mpsc.iter():
+            print('bar', flush=True)
             assert isinstance(channel, AbcChannel)
             print("Got {!r} in channel {!r}".format(msg, channel))