text: ## www.pubnub.com - PubNub Real-time push service in the cloud.
  # coding=utf8
  
  ## PubNub Real-time Push APIs and Notifications Framework
  ## Copyright (c) 2010 Stephen Blum
  ## http://www.pubnub.com/
  
  
  import sys
  from pubnub import PubnubTornado as Pubnub
  
  publish_key = len(sys.argv) > 1 and sys.argv[1] or 'demo'
  subscribe_key = len(sys.argv) > 2 and sys.argv[2] or 'demo'
  secret_key = len(sys.argv) > 3 and sys.argv[3] or 'demo'
  cipher_key = len(sys.argv) > 4 and sys.argv[4] or ''
  ssl_on = len(sys.argv) > 5 and bool(sys.argv[5]) or False
  
  ## -----------------------------------------------------------------------
  ## Initiate Pubnub State
  ## -----------------------------------------------------------------------
  pubnub = Pubnub(publish_key=publish_key, subscribe_key=subscribe_key,
                  secret_key=secret_key, cipher_key=cipher_key, ssl_on=ssl_on)
  channel = 'hello_world'
  message = 'Hello World !!!'
  
  # Asynchronous usage
  
  
  def callback(message):
      print(message)
  
  pubnub.publish(channel, message, callback=callback, error=callback)
  
  pubnub.start()
  