class_docstr: Base class for data generators.
docstr: :return: Return the framework's iterable data generator.
code: def iterator(self):
      """
      :return: Return the framework's iterable data generator.
      """
      return self._iterator
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import abc
  import inspect
  import logging
  from typing import Any, Dict, Generator, Iterator, Optional, Tuple, Union, TYPE_CHECKING
  import numpy
label_desc: Use image node_id 3 for calling the DataGenerator obj's underlying member method code with example usage: obj.iterator() and returns: self