text: from core import ZMQWMError, ZMQWMTimeout, ZMQWMEnvironmentError, ZMQWorkerMissing, ZMQCore
  from node import ZMQNode
  from worker import ZMQWorker
  from work_manager import ZMQWorkManager
  
  import atexit
  atexit.register(ZMQCore.remove_ipc_endpoints)
  del atexit
  
  