code: def __len__(self):
      return math.ceil(len(self.inputs["x"]) / self.batch_size)
  
imports: import math
  import time
  import numpy
  import tensorflow
  from absl.testing import parameterized
  from keras import testing
  from keras.trainers.data_adapters import py_dataset_adapter
  from keras.utils.rng_utils import set_random_seed
label_desc: Use image node_id 2 for calling the DictPyDataset obj's underlying member method code with example usage: obj.__len__() and returns: math