message: Add float dtype to the python API
diff: @@ -3272,9 +3272,10 @@ def combined_non_max_suppression(boxes,
  containing the indices of the selected boxes
  """
  with ops.name_scope(name, 'combined_non_max_suppression'):
  - iou_threshold = ops.convert_to_tensor(iou_threshold, name='iou_threshold')
  + iou_threshold = ops.convert_to_tensor(
  + iou_threshold, dtype=dtypes.float32, name='iou_threshold')
  score_threshold = ops.convert_to_tensor(
  - score_threshold, name='score_threshold')
  + score_threshold, dtype=dtypes.float32, name='score_threshold')
  return gen_image_ops.combined_non_max_suppression(boxes, scores,
  max_output_size_per_class,
  max_total_size,
  