class_docstr: abstract class
class_docstr_tok: ["abstract","class"]
docstr: generate batch examples with epoch
  return tf.data.Dataset
docstr_tok: ["generate","batch","examples","with","epoch","return","tf.data.Dataset"]
code: def dataset(self):
      """generate batch examples with epoch
      return tf.data.Dataset
      """
      return NotImplementedError()
  
file_path: delta/delta/data/task/base_task.py
imports: import abc
label_desc: Use image node_id 6 for calling the Task obj's underlying member method code with example usage: obj.dataset() and returns: NotImplementedError