Issue #26711: Fixed the comparison of plistlib.Data with other types.

3 files changed, 7 insertions, 5 deletions

diff --git a/Lib/plistlib.py b/Lib/plistlib.py
index a39151fb0b..b66639ca9e 100644
--- a/Lib/plistlib.py
+++ b/Lib/plistlib.py
@@ -225,10 +225,10 @@ class Data:
     def __eq__(self, other):
         if isinstance(other, self.__class__):
             return self.data == other.data
-        elif isinstance(other, str):
+        elif isinstance(other, bytes):
             return self.data == other
         else:
-            return id(self) == id(other)
+            return NotImplemented
 
     def __repr__(self):
         return "%s(%s)" % (self.__class__.__name__, repr(self.data))
diff --git a/Lib/test/test_plistlib.py b/Lib/test/test_plistlib.py
index 12d92fa769..662ed904b0 100644
--- a/Lib/test/test_plistlib.py
+++ b/Lib/test/test_plistlib.py
@@ -514,15 +514,15 @@ class TestPlistlibDeprecated(unittest.TestCase):
 
         cur = plistlib.loads(buf)
         self.assertEqual(cur, out_data)
-        self.assertNotEqual(cur, in_data)
+        self.assertEqual(cur, in_data)
 
         cur = plistlib.loads(buf, use_builtin_types=False)
-        self.assertNotEqual(cur, out_data)
+        self.assertEqual(cur, out_data)
         self.assertEqual(cur, in_data)
 
         with self.assertWarns(DeprecationWarning):
             cur = plistlib.readPlistFromBytes(buf)
-        self.assertNotEqual(cur, out_data)
+        self.assertEqual(cur, out_data)
         self.assertEqual(cur, in_data)
 
 
diff --git a/Misc/NEWS b/Misc/NEWS
index 0115a0e2eb..46cd9ca304 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -256,6 +256,8 @@ Core and Builtins
 Library
 -------
 
+- Issue #26711: Fixed the comparison of plistlib.Data with other types.
+
 - Issue #24114: Fix an uninitialized variable in `ctypes.util`.
 
   The bug only occurs on SunOS when the ctypes implementation searches