gh-134062: Fix hash collisions in IPv4Network and IPv6Network

mssalvatore · mssalvatore · commit a3ed2e1f59b2 · 2025-05-16T09:39:09.000-04:00
diff --git a/Lib/ipaddress.py b/Lib/ipaddress.py
@@ -729,7 +729,7 @@ def __eq__(self, other):
             return NotImplemented
 
     def __hash__(self):
-        return hash(int(self.network_address) ^ int(self.netmask))
+        return hash((int(self.network_address), int(self.netmask)))
 
     def __contains__(self, other):
         # always false if one is v4 and the other is v6.
diff --git a/Misc/NEWS.d/next/Library/2025-05-15-14-27-01.gh-issue-134062.fRbJet.rst b/Misc/NEWS.d/next/Library/2025-05-15-14-27-01.gh-issue-134062.fRbJet.rst
@@ -0,0 +1,3 @@
+:mod:`ipaddress`: fix collisions in :meth:`~object.__hash__` for
+:class:`~ipaddress.IPv4Network` and :class:`~ipaddress.IPv6Network`
+objects.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	+:mod:`ipaddress`: fix collisions in :meth:`~object.__hash__` for
	`2`	+:class:`~ipaddress.IPv4Network` and :class:`~ipaddress.IPv6Network`
	`3`	`+objects.`