class_docstr: this provides a decorator to cache function outputs
  to avoid repeating some heavy function computations
code: def __init__(self, func):
      self.func = func
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import datetime
  import os
  import re
  from functools import partial
  import numpy
  import tensorflow
  from scipy import ndimage
  from six import string_types
label_desc: Use image node_id 1 to create a new CacheFunctionOutput object from inherited base classes: object with example: obj = CacheFunctionOutput(func)