#!/usr/bin/env python import dns.name n = dns.name.from_text('www.dnspython.org') o = dns.name.from_text('dnspython.org') print n.is_subdomain(o) # True print n.is_superdomain(o) # False print n > o # True rel = n.relativize(o) # rel is the relative name www n2 = rel + o print n2 == n # True print n.labels # ['www', 'dnspython', 'org', '']