[3.13] gh-125590: Allow FrameLocalsProxy to delete and pop keys from extra locals (GH-125616) (#125797)

gh-125590: Allow FrameLocalsProxy to delete and pop keys from extra locals (GH-125616)
(cherry picked from commit 5b7a872b26)

Co-authored-by: Tian Gao <gaogaotiantian@hotmail.com>

Lib/test/test_frame.py

@@ -399,15 +399,41 @@ class TestFrameLocals(unittest.TestCase):
     def test_delete(self):
         x = 1
         d = sys._getframe().f_locals
-        with self.assertRaises(TypeError):
+
+        # This needs to be tested before f_extra_locals is created
+        with self.assertRaisesRegex(KeyError, 'non_exist'):
+            del d['non_exist']
+
+        with self.assertRaises(KeyError):
+            d.pop('non_exist')
+
+        with self.assertRaisesRegex(ValueError, 'local variables'):
             del d['x']
 
         with self.assertRaises(AttributeError):
             d.clear()
 
-        with self.assertRaises(AttributeError):
+        with self.assertRaises(ValueError):
             d.pop('x')
 
+        with self.assertRaises(ValueError):
+            d.pop('x', None)
+
+        # 'm', 'n' is stored in f_extra_locals
+        d['m'] = 1
+        d['n'] = 1
+
+        with self.assertRaises(KeyError):
+            d.pop('non_exist')
+
+        del d['m']
+        self.assertEqual(d.pop('n'), 1)
+
+        self.assertNotIn('m', d)
+        self.assertNotIn('n', d)
+
+        self.assertEqual(d.pop('n', 2), 2)
+
     @support.cpython_only
     def test_sizeof(self):
         proxy = sys._getframe().f_locals