code: def handleResponse(self, msg):
      ret = msg.get("event") == "pusher:pong"
      if ret:
          logger.debug("Received pusher:pong.")
      return ret
  
imports: import json
  from six.moves.urllib.parse import urlencode
  import pyalgotrade
  from pyalgotrade.websocket import client
  import pyalgotrade.logger
label_desc: Use image node_id 3 for calling the PingKeepAliveMgr obj's underlying member method code with example usage: obj.handleResponse(msg) and returns: ret