Update AttributeError message to match current Python errors

Pyomo · Nov 7, 2024 · 91d74ee · 91d74ee
1 parent 7d37df9
commit 91d74ee
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Showing 2 changed files with 6 additions and 2 deletions.
diff --git a/pyomo/common/config.py b/pyomo/common/config.py
@@ -2714,7 +2714,9 @@ def __getattr__(self, attr):
         # partially constructed ConfigDict (before the _data attribute
         # was declared) can lead to infinite recursion.
         if _attr == "_data" or _attr not in self._data:
-            raise AttributeError("Unknown attribute '%s'" % attr)
+            raise AttributeError(
+                f"'{type(self).__name__}' object has no attribute '{attr}'"
+            )
         return ConfigDict.__getitem__(self, _attr)
 
     def __setattr__(self, name, value):

diff --git a/pyomo/common/tests/test_config.py b/pyomo/common/tests/test_config.py
@@ -2736,7 +2736,9 @@ def test_getattr_setattr(self):
         ):
             config.baz = 10
 
-        with self.assertRaisesRegex(AttributeError, "Unknown attribute 'baz'"):
+        with self.assertRaisesRegex(
+            AttributeError, "'ConfigDict' object has no attribute 'baz'"
+        ):
             a = config.baz
 
     def test_nonString_keys(self):