Issue 23898: Fix inspect.classify_class_attrs() to work with __eq__

Patch by Mike Bayer.

2 files changed, 18 insertions, 3 deletions

diff --git a/Lib/inspect.py b/Lib/inspect.py
index 19b57b4..4aa95da 100644
--- a/Lib/inspect.py
+++ b/Lib/inspect.py
@@ -395,7 +395,7 @@ def classify_class_attrs(cls):
                     # first look in the classes
                     for srch_cls in class_bases:
                         srch_obj = getattr(srch_cls, name, None)
-                        if srch_obj == get_obj:
+                        if srch_obj is get_obj:
                             last_cls = srch_cls
                     # then check the metaclasses
                     for srch_cls in metamro:
@@ -403,7 +403,7 @@ def classify_class_attrs(cls):
                             srch_obj = srch_cls.__getattr__(cls, name)
                         except AttributeError:
                             continue
-                        if srch_obj == get_obj:
+                        if srch_obj is get_obj:
                             last_cls = srch_cls
                     if last_cls is not None:
                         homecls = last_cls
@@ -417,7 +417,7 @@ def classify_class_attrs(cls):
             # unable to locate the attribute anywhere, most likely due to
             # buggy custom __dir__; discard and move on
             continue
-        obj = get_obj or dict_obj
+        obj = get_obj if get_obj is not None else dict_obj
         # Classify the object or its descriptor.
         if isinstance(dict_obj, staticmethod):
             kind = "static method"
diff --git a/Lib/test/test_inspect.py b/Lib/test/test_inspect.py
index a4add38..44405ee 100644
--- a/Lib/test/test_inspect.py
+++ b/Lib/test/test_inspect.py
@@ -888,6 +888,21 @@ class TestClassesAndFunctions(unittest.TestCase):
         should_find_ga = inspect.Attribute('ham', 'data', Meta, 'spam')
         self.assertIn(should_find_ga, inspect.classify_class_attrs(VA))
 
+    def test_classify_overrides_bool(self):
+        class NoBool(object):
+            def __eq__(self, other):
+                return NoBool()
+
+            def __bool__(self):
+                raise NotImplementedError(
+                    "This object does not specify a boolean value")
+
+        class HasNB(object):
+            dd = NoBool()
+
+        should_find_attr = inspect.Attribute('dd', 'data', HasNB, HasNB.dd)
+        self.assertIn(should_find_attr, inspect.classify_class_attrs(HasNB))
+
     def test_classify_metaclass_class_attribute(self):
         class Meta(type):
             fish = 'slap'