def op(name,
       data,
       bucket_count=None,
       display_name=None,
       description=None,
       collections=None):
  """Create a legacy histogram summary op.

  Arguments:
    name: A unique name for the generated summary node.
    data: A `Tensor` of any shape. Must be castable to `float64`.
    bucket_count: Optional positive `int`. The output will have this
      many buckets, except in two edge cases. If there is no data, then
      there are no buckets. If there is data but all points have the
      same value, then there is one bucket whose left and right
      endpoints are the same.
    display_name: Optional name for this summary in TensorBoard, as a
      constant `str`. Defaults to `name`.
    description: Optional long-form description for this summary, as a
      constant `str`. Markdown is supported. Defaults to empty.
    collections: Optional list of graph collections keys. The new
      summary op is added to these collections. Defaults to
      `[Graph Keys.SUMMARIES]`.

  Returns:
    A TensorFlow summary op.
  """
  # TODO(nickfelt): remove on-demand imports once dep situation is fixed.
  import tensorflow.compat.v1 as tf

  if display_name is None:
    display_name = name
  summary_metadata = metadata.create_summary_metadata(
      display_name=display_name, description=description)
  with tf.name_scope(name):
    tensor = _buckets(data, bucket_count=bucket_count)
    return tf.summary.tensor_summary(name='histogram_summary',
                                     tensor=tensor,
                                     collections=collections,
                                     summary_metadata=summary_metadata)
Create a legacy histogram summary op.

  Arguments:
    name: A unique name for the generated summary node.
    data: A `Tensor` of any shape. Must be castable to `float64`.
    bucket_count: Optional positive `int`. The output will have this
      many buckets, except in two edge cases. If there is no data, then
      there are no buckets. If there is data but all points have the
      same value, then there is one bucket whose left and right
      endpoints are the same.
    display_name: Optional name for this summary in TensorBoard, as a
      constant `str`. Defaults to `name`.
    description: Optional long-form description for this summary, as a
      constant `str`. Markdown is supported. Defaults to empty.
    collections: Optional list of graph collections keys. The new
      summary op is added to these collections. Defaults to
      `[Graph Keys.SUMMARIES]`.

  Returns:
    A TensorFlow summary op.