code: def _decode(self, s):
          '''This converts from the external coding system (as passed to
          the constructor) to the internal one (unicode). '''
          if self.decoder is not None:
              return self.decoder.decode(s)
          else:
              raise TypeError("This screen was constructed with encoding=None, "
                              "so it does not handle bytes."f _decode(self, s):
          '''This converts from the external coding system (as passed to
          the constructor) to the internal one (unicode). '''
          if self.decoder is not None:
              return self.decoder.decode(s)
          else:
              raise TypeError("This screen was constructed with encoding=None, "
                              "so it does not handle bytes.")
docs: This converts from the external coding system (as passed to
          the constructor) to the internal one (unicode).