code: def output_stderr(self, text):
          "*text* should be bytes"
          binary_stderr.write(b''.join([
              self._red,
              b't=%07d' % (time.time() - self._t0),
              self._reset,
              b' ',
              text,
          ]))
          binary_stderr.flush(f output_stderr(self, text):
          "*text* should be bytes"
          binary_stderr.write(b''.join([
              self._red,
              b't=%07d' % (time.time() - self._t0),
              self._reset,
              b' ',
              text,
          ]))
          binary_stderr.flush()
docs: *text* should be bytes