Poller not recognizing there's new data to be read

websocket_client.py

from twisted.internet import reactor
from autobahn.websocket import WebSocketClientFactory,WebSocketClientProtocol, connectWS

class EchoClientProtocol(WebSocketClientProtocol):
  def onOpen(self):
    self.sendMessage("1", False)
    self.sendMessage("2", False)

if __name__ == '__main__':
  factory = WebSocketClientFactory("ws://localhost:8000/echo")
  factory.protocol = EchoClientProtocol
  connectWS(factory)
  reactor.run()

websocket_server_select_poller.py

from gevent import pywsgi
from geventwebsocket.handler import WebSocketHandler
from select import poll
import select
 
def websocket_app(environ, start_response):
  if environ["PATH_INFO"] == "/echo":
    ws = environ["wsgi.websocket"]
    poller = poll()
    fileno = ws.stream.handler.socket.fileno()
    poller.register(fileno, select.POLLIN)
    while True:
      events = dict(poller.poll())
      if fileno in events:
        data = ws.receive()
        print data
 
server = pywsgi.WSGIServer(("", 8000), websocket_app, handler_class=WebSocketHandler)
server.serve_forever()