tensorflow/models · error · ValueError

Each row of the csv label map file must be in `id,name` form

Error message

Each row of the csv label map file must be in `id,name` format. length = {}

What it means

Error "Each row of the csv label map file must be in `id,name` format. length = {}" thrown in tensorflow/models.

Source

Thrown at official/vision/dataloaders/tf_example_label_map_decoder.py:57

        tf.lookup.KeyValueTensorInitializer(
            keys=tf.constant(list(name_to_id.keys()), dtype=tf.string),
            values=tf.constant(list(name_to_id.values()), dtype=tf.int64)),
        default_value=-1)

  def _process_label_map(self, label_map):
    if label_map.endswith('.csv'):
      name_to_id = self._process_csv(label_map)
    else:
      raise ValueError('The label map file is in incorrect format.')
    return name_to_id

  def _process_csv(self, label_map):
    name_to_id = {}
    with tf.io.gfile.GFile(label_map, 'r') as f:
      reader = csv.reader(f, delimiter=',')
      for row in reader:
        if len(row) != 2:
          raise ValueError('Each row of the csv label map file must be in '
                           '`id,name` format. length = {}'.format(len(row)))
        id_index = int(row[0])
        name = row[1]
        name_to_id[name] = id_index
    return name_to_id

  def _decode_classes(self, parsed_tensors):
    return self._name_to_id_table.lookup(
        parsed_tensors['image/object/class/text'])

View on GitHub (pinned to e006f5f0d5)

When it happens

Trigger: Thrown at official/vision/dataloaders/tf_example_label_map_decoder.py:57 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of tensorflow/models@e006f5f0d5 (2026-08-24). Data as JSON: /api/errors/8afefcb9dfd24cf3. Report an issue: GitHub.