Use '%T'

Author: johnslavik

Lib/test/test_exceptions.py

@@ -2054,16 +2054,16 @@ def __getattr__(self, name):
                 raise AttributeError(name)
         with self.assertRaises(AttributeError) as cm:
             getattr(RaiseWithName(), "missing1")
-        self.assertEqual(str(cm.exception),
-                         "'RaiseWithName' object has no attribute 'missing1'")
+        self.assertRegex(str(cm.exception),
+                         r"'.+\.RaiseWithName' object has no attribute 'missing1'")
 
         class BareRaise:
             def __getattr__(self, name):
                 raise AttributeError
         with self.assertRaises(AttributeError) as cm:
             getattr(BareRaise(), "missing2")
-        self.assertEqual(str(cm.exception),
-                         "'BareRaise' object has no attribute 'missing2'")
+        self.assertRegex(str(cm.exception),
+                         r"'.+\.BareRaise' object has no attribute 'missing2'")
 
         class RaiseCustom:
             def __getattr__(self, name):

Objects/exceptions.c

@@ -2738,8 +2738,8 @@ AttributeError_str(PyObject *op)
             result = PyUnicode_FromFormat("module has no attribute '%U'", name);
         }
     } else {
-        result = PyUnicode_FromFormat("'%.200s' object has no attribute '%U'",
-                                      Py_TYPE(obj)->tp_name, name);
+        result = PyUnicode_FromFormat("'%T' object has no attribute '%U'",
+                                      obj, name);
     }
     Py_DECREF(obj);
     Py_DECREF(name);