class_docstr: Adapter for `keras.utils.PyDataset` instances.
code: def batch_size(self):
      return None
  
imports: import multiprocessing.dummy
  import queue
  import random
  import threading
  import time
  import warnings
  import weakref
  from contextlib import closing
  import numpy
  import tree
  from keras.api_export import keras_export
  from keras.trainers.data_adapters import data_adapter_utils
  from keras.trainers.data_adapters.data_adapter import DataAdapter
label_desc: Use image node_id 9 for calling the PyDatasetAdapter obj's underlying member method code with example usage: obj.batch_size() and returns: None