class_docstr: Manages items to be ventilated to a worker pool.
class_docstr_tok: ["Manages","items","to","be","ventilated","to","a","worker","pool","."]
docstr: Starts the ventilator, beginning to ventilate to the worker pool after this call.
  Therefore the worker pool must be ready to receive ventilated items.
docstr_tok: ["Starts","the","ventilator",",","beginning","to","ventilate","to","the","worker","pool","after","this","call",".","Therefore","the","worker","pool","must","be","ready","to","receive","ventilated","items","."]
code: def start(self):
      """Starts the ventilator, beginning to ventilate to the worker pool after this call.
      Therefore the worker pool must be ready to receive ventilated items.
      """
      return
  
imports: import numpy
  import threading
  from abc import ABCMeta, abstractmethod
  from time import sleep
  import six
label_desc: Use image node_id 2 for calling the Ventilator obj's underlying member method code with example usage: obj.start() without return types