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[3.13] gh-118921: Add copy() method for FrameLocalsProxy (GH-118923) (#118933)

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(cherry picked from commit 35c436186b)

Co-authored-by: Tian Gao <gaogaotiantian@hotmail.com>
This commit is contained in:
Miss Islington (bot) 2024-05-11 01:15:54 +02:00 • committed by GitHub
parent 7dc9e923d1
commit 93ef7aa03c
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3 changed files with 29 additions and 3 deletions
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12
Lib/test/test_frame.py
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@ -371,6 +371,15 @@ class TestFrameLocals(unittest.TestCase):
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.assertIsInstance(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 @@ class TestFrameLocals(unittest.TestCase):
def test_unsupport(self):
x = 1
d = sys._getframe().f_locals
with self.assertRaises(AttributeError):
d.copy()
with self.assertRaises(TypeError):
copy.copy(d)

1
Misc/NEWS.d/next/Core and Builtins/2024-05-10-19-54-18.gh-issue-118921.O4ztZG.rst Normal file
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@ -0,0 +1 @@
Add ``copy()`` method for ``FrameLocalsProxy`` which returns a snapshot ``dict`` for local variables.

19
Objects/frameobject.c
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@ -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,