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-rwxr-xr-xexamples/reverse.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/examples/reverse.py b/examples/reverse.py
index 4318317..b0a867d 100755
--- a/examples/reverse.py
+++ b/examples/reverse.py
@@ -35,7 +35,7 @@ for filename in sys.argv[1:]:
reverse_map[rdata.address] = [name.to_text()]
keys = reverse_map.keys()
-keys.sort(lambda a1, a2: cmp(dns.ipv4.inet_aton(a1), dns.ipv4.inet_aton(a2)))
+keys.sort(key=dns.ipv4.inet_aton)
for k in keys:
v = reverse_map[k]
v.sort()