gh-75367: fix data descriptor detection in inspect.getattr_static

Lib/inspect.py

@@ -1835,8 +1835,10 @@ def getattr_static(obj, attr, default=_sentinel):
     klass_result = _check_class(klass, attr)
 
     if instance_result is not _sentinel and klass_result is not _sentinel:
-        if (_check_class(type(klass_result), '__get__') is not _sentinel and
-            _check_class(type(klass_result), '__set__') is not _sentinel):
+        if _check_class(type(klass_result), "__get__") is not _sentinel and (
+            _check_class(type(klass_result), "__set__") is not _sentinel
+            or _check_class(type(klass_result), "__delete__") is not _sentinel
+        ):
             return klass_result
 
     if instance_result is not _sentinel:

Lib/test/test_inspect.py

@@ -2052,6 +2052,20 @@ class Foo(object):
         descriptor.__set__ = lambda s, i, v: None
         self.assertEqual(inspect.getattr_static(foo, 'd'), Foo.__dict__['d'])
 
+        class DescriptorGetDelete:
+            def __get__(self, instance, klass):
+                return 'bar'
+            def __delete__(self, instance, klass):
+                pass
+        class Bar:
+            get_delete = DescriptorGetDelete()
+            def __init__(self):
+                self.__dict__['get_delete'] = 42
+
+        bar = Bar()
+        self.assertNotEqual(inspect.getattr_static(bar, 'get_delete'), 42)
+        self.assertIsInstance(inspect.getattr_static(bar, 'get_delete'), DescriptorGetDelete)
+
 
     def test_metaclass_with_descriptor(self):
         class descriptor(object):