code: def serializeGt(x, compress=True):
      
      assertType(x, GtElement)
      return _serialize(x, compress, librelic.gt_size_bin_abi,
          librelic.gt_write_bin_abi)
docs: Converts Gt element @x into an array of bytes. If @compress is True, 
      the point will be compressed resulting in a much shorter string of bytes.