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bpo-26579: Add object.__getstate__(). (GH-2821)

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Copying and pickling instances of subclasses of builtin types
bytearray, set, frozenset, collections.OrderedDict, collections.deque,
weakref.WeakSet, and datetime.tzinfo now copies and pickles instance attributes
implemented as slots.
This commit is contained in:
Serhiy Storchaka 2022-04-06 20:00:14 +03:00 • committed by GitHub
parent f82f9ce323
commit 884eba3c76
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GPG key ID: 4AEE18F83AFDEB23
25 changed files with 389 additions and 255 deletions
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20
Objects/odictobject.c
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@ -947,23 +947,13 @@ PyDoc_STRVAR(odict_reduce__doc__, "Return state information for pickling");
static PyObject *
odict_reduce(register PyODictObject *od, PyObject *Py_UNUSED(ignored))
{
PyObject *dict = NULL, *result = NULL;
PyObject *state, *result = NULL;
PyObject *items_iter, *items, *args = NULL;
/* capture any instance state */
dict = PyObject_GetAttr((PyObject *)od, &_Py_ID(__dict__));
if (dict == NULL)
state = _PyObject_GetState((PyObject *)od);
if (state == NULL)
goto Done;
else {
/* od.__dict__ isn't necessarily a dict... */
Py_ssize_t dict_len = PyObject_Length(dict);
if (dict_len == -1)
goto Done;
if (!dict_len) {
/* nothing to pickle in od.__dict__ */
Py_CLEAR(dict);
}
}
/* build the result */
args = PyTuple_New(0);
@ -979,11 +969,11 @@ odict_reduce(register PyODictObject *od, PyObject *Py_UNUSED(ignored))
if (items_iter == NULL)
goto Done;
result = PyTuple_Pack(5, Py_TYPE(od), args, dict ? dict : Py_None, Py_None, items_iter);
result = PyTuple_Pack(5, Py_TYPE(od), args, state, Py_None, items_iter);
Py_DECREF(items_iter);
Done:
Py_XDECREF(dict);
Py_XDECREF(state);
Py_XDECREF(args);
return result;