Class octetstring

Lib/test/test_descr.py:3733–3737

        import binascii

        class octetstring(str):
            def __str__(self):
                return binascii.b2a_hex(self.encode('ascii')).decode("ascii")
            def __repr__(self):
                return self + " repr"

        o = octetstring('A')
        self.assertEqual(type(o), octetstring)