Method rev

Lib/test/test_descr.py:3072–3078

(self)

        class madunicode(str):
            _rev = None
            def rev(self):
                if self._rev is not None:
                    return self._rev
                L = list(self)
                L.reverse()
                self._rev = self.__class__("".join(L))
                return self._rev
        u = madunicode("ABCDEF")
        self.assertEqual(u, "ABCDEF")
        self.assertEqual(u.rev(), madunicode("FEDCBA"))