code: def _handle_status(self, key, value):
          
          informational_keys = ["KEY_CONSIDERED"]
          if key in ("EXPORTED"):
              self.fingerprints.append(value)
          elif key == "EXPORT_RES":
              export_res = value.split()
              for x in self.counts.keys():
                  self.counts[x] += int(export_res.pop(0))
          elif key not in informational_keys:
              raise ValueError("Unknown status message: %r" % key)
docs: Parse a status code from the attached GnuPG process.
  
          :raises ValueError: if the status message is unknown.