text format or the DNS wire format.
Labels are in the same order as in the DNS textual form, e.g. the labels
-value for ``www.dnspython.org.`` is ``(b'www', b'dnspython', b'org', b'')`` on
-Python 3, and ``('www', 'dnspython', 'org', '')`` on Python 2.
+value for ``www.dnspython.org.`` is ``(b'www', b'dnspython', b'org', b'')``.
Names may be *absolute* or *relative*. Absolute names end in the root label,
which is an empty ``bytes``. Relative names do not end in the root label. To