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gh-118285: Fix signatures of operator.{attrgetter,itemgetter,methodcaller} instances (GH-118316)

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* Allow to specify the signature of custom callable instances of extension
  type by the __text_signature__ attribute.
* Specify signatures of operator.attrgetter, operator.itemgetter, and
  operator.methodcaller instances.
This commit is contained in:
Serhiy Storchaka 2024-04-29 19:30:48 +03:00 • committed by GitHub
parent 51c70de998
commit 444ac0b7a6
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6 changed files with 76 additions and 5 deletions
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15
Modules/_operator.c
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@ -966,6 +966,18 @@ static struct PyMethodDef operator_methods[] = {
};
static PyObject *
text_signature(PyObject *self, void *Py_UNUSED(ignored))
{
return PyUnicode_FromString("(obj, /)");
}
static PyGetSetDef common_getset[] = {
{"__text_signature__", text_signature, (setter)NULL},
{NULL}
};
/* itemgetter object **********************************************************/
typedef struct {
@ -1171,6 +1183,7 @@ static PyType_Slot itemgetter_type_slots[] = {
{Py_tp_clear, itemgetter_clear},
{Py_tp_methods, itemgetter_methods},
{Py_tp_members, itemgetter_members},
{Py_tp_getset, common_getset},
{Py_tp_new, itemgetter_new},
{Py_tp_getattro, PyObject_GenericGetAttr},
{Py_tp_repr, itemgetter_repr},
@ -1528,6 +1541,7 @@ static PyType_Slot attrgetter_type_slots[] = {
{Py_tp_clear, attrgetter_clear},
{Py_tp_methods, attrgetter_methods},
{Py_tp_members, attrgetter_members},
{Py_tp_getset, common_getset},
{Py_tp_new, attrgetter_new},
{Py_tp_getattro, PyObject_GenericGetAttr},
{Py_tp_repr, attrgetter_repr},
@ -1863,6 +1877,7 @@ static PyType_Slot methodcaller_type_slots[] = {
{Py_tp_clear, methodcaller_clear},
{Py_tp_methods, methodcaller_methods},
{Py_tp_members, methodcaller_members},
{Py_tp_getset, common_getset},
{Py_tp_new, methodcaller_new},
{Py_tp_getattro, PyObject_GenericGetAttr},
{Py_tp_repr, methodcaller_repr},