class_docstr: Tensorflow backend datasets. 
class_docstr_tok: ["Tensorflow","backend","datasets","."]
code: def __len__(self) -> int:
      return self.X.shape[0] // self.batch_size
  
imports: import os
  import random
  from typing import Any, List, Dict, Callable, Union, Optional, TYPE_CHECKING
  import numpy
  import tensorflow
  import tensorflow.keras
  from alibi.explainers.backends.cfrl_base import CounterfactualRLDataset
  from alibi.models.tensorflow.actor_critic import Actor, Critic
label_desc: Use image node_id 3 for calling the TfCounterfactualRLDataset obj's underlying member method code with example usage: obj.__len__() and returns: unknown