tensorflow/models · error · ValueError

{} does not have enough elements to gather, {} < {}

Error message

{} does not have enough elements to gather, {} < {}

What it means

Error "{} does not have enough elements to gather, {} < {}" thrown in tensorflow/models.

Source

Thrown at official/projects/pointpillars/utils/wod_detection_evaluator.py:54

  def __init__(self, model_config, config=None):
    super().__init__(config=config)

    image_config = model_config.image
    self._resolution = image_config.resolution
    self._vehicle_xy = utils.get_vehicle_xy(image_config.height,
                                            image_config.width,
                                            image_config.x_range,
                                            image_config.y_range)
    self._classes = model_config.classes

  def _remove_padding(self, tensor_dict: Mapping[str, Any],
                      num_valid: int) -> Mapping[str, Any]:
    """Remove the paddings of the prediction/groundtruth data."""
    result_tensor_dict = {}
    gather_indices = tf.range(num_valid)
    for k, v in tensor_dict.items():
      if v.shape[0] < num_valid:
        raise ValueError(
            '{} does not have enough elements to gather, {} < {}'.format(
                k, v.shape[0], num_valid))
      result_tensor_dict[k] = tf.gather(v, gather_indices)
    return result_tensor_dict

  def _compact_tensors(self,
                       tensor_dict: Mapping[str, Any]) -> Mapping[str, Any]:
    """Compact tensors by concatenating them in tuples."""
    compact_tensor_dict = {}
    for k, v in tensor_dict.items():
      if isinstance(v, tuple):
        compact_tensor_dict[k] = tf.concat(v, axis=0)
      elif isinstance(v, dict):
        compact_tensor_dict[k] = v
        for dk, dv in v.items():
          if isinstance(dv, tuple):
            compact_tensor_dict[k][dk] = tf.concat(dv, axis=0)
      else:

View on GitHub (pinned to e006f5f0d5)

When it happens

Trigger: Thrown at official/projects/pointpillars/utils/wod_detection_evaluator.py:54 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/4b8c263e93e8ed58. Report an issue: GitHub.