code: def __checkStop(self):
      if self.__errors == 0:
          return
      if self.__unknown_events == 0:
          return
      # Give it some time to send ping messages.
      if (
          self.__connected is None
          or (
              datetime.datetime.now() - self.__connected
          ).total_seconds()
          < 3
      ):
          return
  
      self.close()
  
imports: import unittest
  import threading
  import datetime
  from pyalgotrade.websocket import pusher
  from pyalgotrade.websocket import client
label_desc: Use image node_id 2 for calling the WebSocketClient obj's underlying member method code with example usage: obj.__checkStop() without return types