message: Re-introduce support for key-value records into tf.data.read_batch_features.
diff: @@ -171,6 +171,8 @@ def read_batch_features(file_pattern,
  dataset = reader(filenames, *reader_args)
  else:
  dataset = reader(filenames)
  + if dataset.output_types == (dtypes.string, dtypes.string):
  + dataset = dataset.map(lambda _, v: v)
  if num_epochs != 1:
  dataset = dataset.repeat(num_epochs)
  if randomize_input:
  