Obtains values for histogram data given blob and dtype enum.
    Args:
      data_blob: The blob obtained from the database.
      dtype_enum: The enum representing the dtype.
      shape_string: A comma-separated string of numbers denoting shape.
    Returns:
      The histogram values as a list served to the frontend.

def _get_values(self, data_blob, dtype_enum, shape_string):
    """Obtains values for histogram data given blob and dtype enum.
    Args:
      data_blob: The blob obtained from the database.
      dtype_enum: The enum representing the dtype.
      shape_string: A comma-separated string of numbers denoting shape.
    Returns:
      The histogram values as a list served to the frontend.
    """
    buf = np.frombuffer(data_blob, dtype=tf.DType(dtype_enum).as_numpy_dtype)
    return buf.reshape([int(i) for i in shape_string.split(',')]).tolist()