code: def decode(self, ids, strip_extraneous=False):
      
      del strip_extraneous
      return " ".join([str(i) for i in ids])
docs: 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.