code: def __getitem__(self, id):
      if type(id) in [list, np.ndarray]:
          return [self.function(self.array[i]) for i in id]
      elif isinstance(id, slice):
          return [self.function(arr) for arr in self.array[id]]
      else:
          return self.function(self.array[id])
  
imports: from __future__ import division, print_function, absolute_import
  import os
  import random
  import numpy
  from PIL import Image
  import pickle
  import csv
  import warnings
  import tensorflow.compat.v1
  from io import BytesIO
label_desc: Use image node_id 2 for calling the Preloader obj's underlying member method code with example usage: obj.__getitem__(id) and returns: unknown, unknown, self