class_docstr: MNIST.
code: def _info(self):
      return tfds.core.DatasetInfo(
          builder=self,
          description="The MNIST database of handwritten digits.",
          features=tfds.features.FeaturesDict(
              {
                  "image": tfds.features.Image(shape=MNIST_IMAGE_SHAPE),
                  "label": tfds.features.ClassLabel(
                      num_classes=MNIST_NUM_CLASSES
                  ),
              }
          ),
          supervised_keys=("image", "label"),
          homepage="http://yann.lecun.com/exdb/mnist/",
          citation=_MNIST_CITATION,
      )
  
imports: import os
  import numpy
  from six.moves import urllib
  from tensorflow_datasets.core.utils.lazy_imports_utils import tensorflow
  import tensorflow_datasets.public_api
label_desc: Use image node_id 1 for calling the MNIST obj's underlying member method code with example usage: obj._info() and returns: tfds