commit b30ee26e366bf509b7538d79bfec6c6d38d53f28
author Ravi Teja P <rvteja92@gmail.com> Mon Jun 29 23:09:29 2020 +0530
committer GitHub <noreply@github.com> Mon Jun 29 13:39:29 2020 -0400
tree 83f94a2f45115a972cecf8eba556de4bfa03235a
parent a3ad95dd2176b529fb6a9f763955b5cc1b499dbb

bpo-41004: Resolve hash collisions for IPv4Interface and IPv6Interface (GH-21033)

The __hash__() methods of classes IPv4Interface and IPv6Interface had issue
of generating constant hash values of 32 and 128 respectively causing hash collisions.
The fix uses the hash() function to generate hash values for the objects
instead of XOR operation

Lib/ipaddress.py

diff --git a/Lib/ipaddress.py b/Lib/ipaddress.py
index 6e5a754..75b4c35 100644
--- a/Lib/ipaddress.py
+++ b/Lib/ipaddress.py
@@ -1420,7 +1420,7 @@
             return False
 
     def __hash__(self):
-        return self._ip ^ self._prefixlen ^ int(self.network.network_address)
+        return hash((self._ip, self._prefixlen, int(self.network.network_address)))
 
     __reduce__ = _IPAddressBase.__reduce__
 
@@ -2120,7 +2120,7 @@
             return False
 
     def __hash__(self):
-        return self._ip ^ self._prefixlen ^ int(self.network.network_address)
+        return hash((self._ip, self._prefixlen, int(self.network.network_address)))
 
     __reduce__ = _IPAddressBase.__reduce__