class_docstr: Helper class for passing-back and re-raising an exception from inside a TensorFlow dataset generator.
  Used in conjunction with `remember_exception`.
code: def __init__(self):
      self.exception = None
  
imports: import os
  import sys
  import time
  import heapq
  import semver
  import random
  from multiprocessing import Pool
  from collections import namedtuple
label_desc: Use image node_id 1 to create a new ExceptionBox object  with example: obj = ExceptionBox()