Transform sequence of float values into string (float values).

    Args:
      ids: array of floats to be converted.
      strip_extraneous: unused

    Returns:
      String having space separated float values.

    Raises:
      ValueError: if the ids are not of the appropriate size.

def decode(self, ids, strip_extraneous=False):
    """Transform sequence of float values into string (float values).

    Args:
      ids: array of floats to be converted.
      strip_extraneous: unused

    Returns:
      String having space separated float values.

    Raises:
      ValueError: if the ids are not of the appropriate size.
    """
    del strip_extraneous
    return " ".join([str(i) for i in ids])