/usr/share/doc/python3-dnspython/examples/name.py is in python3-dnspython 1.12.0-0ubuntu3.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 | #!/usr/bin/env python3
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) # (b'www', b'dnspython', b'org', b'')
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