class_docstr: Manages items to be ventilated to a worker pool.
class_docstr_tok: ["Manages","items","to","be","ventilated","to","a","worker","pool","."]
docstr: A callback for the worker pool to tell the ventilator that it has processed an item from the ventilation
  queue. This allows the ventilator to know how many items are currently on the ventilation queue.
  This function should not have a return value.
docstr_tok: ["A","callback","for","the","worker","pool","to","tell","the","ventilator","that","it","has","processed","an","item","from","the","ventilation","queue",".","This","allows","the","ventilator","to","know","how","many","items","are","currently","on","the","ventilation","queue",".","This","function","should","not","have","a","return","value","."]
code: def processed_item(self):
      """A callback for the worker pool to tell the ventilator that it has processed an item from the ventilation
      queue. This allows the ventilator to know how many items are currently on the ventilation queue.
      This function should not have a return value."""
  
imports: import numpy
  import threading
  from abc import ABCMeta, abstractmethod
  from time import sleep
  import six
label_desc: Use image node_id 3 for calling the Ventilator obj's underlying member method code with example usage: obj.processed_item() without return types