[icb08]

set_name is a built-in method of the property built-in, present from 3.10+

[icb08]

Original stub test allow lists had:

builtins.property.__set_name__  # Doesn't actually exist

That comments a bit misleading? CPython has implemented a public property.__set_name__ built-in method since Python v3.10.0?

Proof in Python:

assert hasattr(property, "__set_name__")
assert property.__set_name__(property(), object, "x") is None

from sys import version_info
if version_info >= "3.13":
   x = property()
   x.__set_name__(object, "y")
   assert x.__name__ == "y"

Proof in Python Source (v3.10.0 tag commit):

static PyObject *
property_set_name(PyObject *self, PyObject *args) {
    if (PyTuple_GET_SIZE(args) != 2) {
        PyErr_Format(
                PyExc_TypeError,
                "__set_name__() takes 2 positional arguments but %d were given",
                PyTuple_GET_SIZE(args));
        return NULL;
    }

    propertyobject *prop = (propertyobject *)self;
    PyObject *name = PyTuple_GET_ITEM(args, 1);

    Py_XINCREF(name);
    Py_XSETREF(prop->prop_name, name);

    Py_RETURN_NONE;
}

static PyMethodDef property_methods[] = {
    {"getter", property_getter, METH_O, getter_doc},
    {"setter", property_setter, METH_O, setter_doc},
    {"deleter", property_deleter, METH_O, deleter_doc},
    {"__set_name__", property_set_name, METH_VARARGS, set_name_doc},
    {0}
};

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

pytest-autoprofile (https://gitlab.com/TTsangSC/pytest-autoprofile)
+ src/pytest_autoprofile/importers.py:343: error: Unused "type: ignore" comment  [unused-ignore]

[JelleZijlstra]

Yes, I'm not sure what that comment was talking about.