Save progress

adiaholic · adiaholic · commit 0e9b25cde715 · 2024-05-28T13:24:50.000-06:00
diff --git a/Doc/library/dataclasses.rst b/Doc/library/dataclasses.rst
@@ -461,9 +461,8 @@ Module contents
 
 .. function:: is_dataclass(obj)
 
-   Return ``True`` if its parameter is a dataclass, an instance of a dataclass,
-   or a subclass of a dataclass, otherwise return ``False``. Note that subclasses
-   of dataclasses inherit the properties of the dataclass so will return ``True``.
+   Return ``True`` if its parameter is a dataclass (including subclasses of a dataclass)
+   or an instance of one, otherwise return ``False``.
 
    If you need to know if a class is an instance of a dataclass (and
    not a dataclass itself), then add a further check for ``not
diff --git a/Lib/test/test_dataclasses/__init__.py b/Lib/test/test_dataclasses/__init__.py
@@ -1555,16 +1555,15 @@ class X:
             y: int
 
         class Z(X):
-            z: int = 0  # Adding a default field to demonstrate inheritance and dataclass behavior
+            pass
 
-        # Check if X is a dataclass
+        # Assert that both X and Z are recognized as dataclasses
         self.assertTrue(is_dataclass(X), "X should be a dataclass")
-        # Check if Z is a dataclass, it should inherit the dataclass behavior from X
         self.assertTrue(is_dataclass(Z), "Z should be a dataclass because it inherits from X")
-        # Create an instance of Z and check if the default values are set correctly
+        
+        # Instantiate Z and verify it is recognized as a dataclass
         z_instance = Z(y=5)
-        self.assertEqual(z_instance.y, 5, "The value of y should be set to 5")
-        self.assertEqual(z_instance.z, 0, "The default value of z should be 0")
+        self.assertTrue(is_dataclass(z_instance), "z_instance should be a dataclass because it is an instance of Z")
 
     def test_helper_fields_with_class_instance(self):
         # Check that we can call fields() on either a class or instance,
