code: def example_label(example: example_pb2.Example) -> Optional[int]:
      """Gets the label field from example as a string."""
      if "label" not in example.features.feature:
          return None
      return int(example.features.feature["label"].int64_list.value[0])
  
imports: import json
  from typing import Optional
  from absl import logging
  import numpy
  import tensorflow
  from deepvariant.protos import deepvariant_pb2
  from third_party.nucleus.io import sharded_file_utils
  from third_party.nucleus.io import tfrecord
  from third_party.nucleus.protos import variants_pb2
  from tensorflow.core.example import example_pb2
label_desc: Use image node_id 7 for calling a global function with example usage: example_label(example) and returns: int, None