From aa0348d8589c3761b73704f81d1077a044b9e663 Mon Sep 17 00:00:00 2001
From: Tian Gao <gaogaotiantian@hotmail.com>
Date: Fri, 10 May 2024 12:52:17 -0700
Subject: [PATCH 1/3] Add copy() method for FrameLocalsProxy

---
 Lib/test/test_frame.py | 12 +++++++++---
 Objects/frameobject.c  | 19 +++++++++++++++++++
 2 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/Lib/test/test_frame.py b/Lib/test/test_frame.py
index 212255374bddd1..ad0304104f6e3b 100644
--- a/Lib/test/test_frame.py
+++ b/Lib/test/test_frame.py
@@ -371,6 +371,15 @@ def test_local_objects(self):
         f_locals['o'] = f_locals['k']
         self.assertEqual(o, 'a.b.c')
 
+    def test_copy(self):
+        x = 0
+        d = sys._getframe().f_locals
+        d_copy = d.copy()
+        self.assertIs(type(d_copy), dict)
+        self.assertEqual(d_copy['x'], 0)
+        d_copy['x'] = 1
+        self.assertEqual(x, 0)
+
     def test_update_with_self(self):
         def f():
             f_locals = sys._getframe().f_locals
@@ -405,9 +414,6 @@ def test_sizeof(self):
     def test_unsupport(self):
         x = 1
         d = sys._getframe().f_locals
-        with self.assertRaises(AttributeError):
-            d.copy()
-
         with self.assertRaises(TypeError):
             copy.copy(d)
 
diff --git a/Objects/frameobject.c b/Objects/frameobject.c
index d7fcb1925d286c..64fded85de1468 100644
--- a/Objects/frameobject.c
+++ b/Objects/frameobject.c
@@ -637,6 +637,23 @@ framelocalsproxy_setdefault(PyObject* self, PyObject *const *args, Py_ssize_t na
     return result;
 }
 
+static PyObject*
+framelocalsproxy_copy(PyObject *self, PyObject *Py_UNUSED(ignored))
+{
+    PyObject* result = PyDict_New();
+
+    if (result == NULL) {
+        return NULL;
+    }
+
+    if (PyDict_Update(result, self) < 0) {
+        Py_DECREF(result);
+        return NULL;
+    }
+
+    return result;
+}
+
 static PyObject*
 framelocalsproxy_reversed(PyObject *self, void *Py_UNUSED(ignored))
 {
@@ -677,6 +694,8 @@ static PyMethodDef framelocalsproxy_methods[] = {
      NULL},
     {"__reversed__", _PyCFunction_CAST(framelocalsproxy_reversed),       METH_NOARGS,
      NULL},
+    {"copy",         _PyCFunction_CAST(framelocalsproxy_copy),           METH_NOARGS,
+     NULL},
     {"keys",         _PyCFunction_CAST(framelocalsproxy_keys),           METH_NOARGS,
      NULL},
     {"values",       _PyCFunction_CAST(framelocalsproxy_values),         METH_NOARGS,

From 3ecbe358d41e387befbbdb83b725998be1ad00ac Mon Sep 17 00:00:00 2001
From: "blurb-it[bot]" <43283697+blurb-it[bot]@users.noreply.github.com>
Date: Fri, 10 May 2024 19:54:21 +0000
Subject: [PATCH 2/3] =?UTF-8?q?=F0=9F=93=9C=F0=9F=A4=96=20Added=20by=20blu?=
 =?UTF-8?q?rb=5Fit.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../2024-05-10-19-54-18.gh-issue-118921.O4ztZG.rst               | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Misc/NEWS.d/next/Core and Builtins/2024-05-10-19-54-18.gh-issue-118921.O4ztZG.rst

diff --git a/Misc/NEWS.d/next/Core and Builtins/2024-05-10-19-54-18.gh-issue-118921.O4ztZG.rst b/Misc/NEWS.d/next/Core and Builtins/2024-05-10-19-54-18.gh-issue-118921.O4ztZG.rst
new file mode 100644
index 00000000000000..39ccf472067cfd
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2024-05-10-19-54-18.gh-issue-118921.O4ztZG.rst	
@@ -0,0 +1 @@
+Add ``copy()`` method for ``FrameLocalsProxy`` which returns a snapshot ``dict`` for local variables.

From 75b71213a784553f23bfd0f8c0fb3263946893eb Mon Sep 17 00:00:00 2001
From: Tian Gao <gaogaotiantian@hotmail.com>
Date: Fri, 10 May 2024 15:07:03 -0700
Subject: [PATCH 3/3] Use assertIsInstance

---
 Lib/test/test_frame.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/test/test_frame.py b/Lib/test/test_frame.py
index ad0304104f6e3b..aee8d374b22710 100644
--- a/Lib/test/test_frame.py
+++ b/Lib/test/test_frame.py
@@ -375,7 +375,7 @@ def test_copy(self):
         x = 0
         d = sys._getframe().f_locals
         d_copy = d.copy()
-        self.assertIs(type(d_copy), dict)
+        self.assertIsInstance(d_copy, dict)
         self.assertEqual(d_copy['x'], 0)
         d_copy['x'] = 1
         self.assertEqual(x, 0)