Issue #13577: various kinds of descriptors now have a __qualname__ attribute.
Patch by sbt.
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16e6a80923
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@ -42,6 +42,7 @@ typedef struct {
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PyObject_HEAD
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PyTypeObject *d_type;
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PyObject *d_name;
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PyObject *d_qualname;
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} PyDescrObject;
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#define PyDescr_COMMON PyDescrObject d_common
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@ -4442,6 +4442,24 @@ order (MRO) for bases """
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self.assertIn("can't delete X.__doc__", str(cm.exception))
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self.assertEqual(X.__doc__, "banana")
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def test_qualname(self):
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descriptors = [str.lower, complex.real, float.real, int.__add__]
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types = ['method', 'member', 'getset', 'wrapper']
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# make sure we have an example of each type of descriptor
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for d, n in zip(descriptors, types):
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self.assertEqual(type(d).__name__, n + '_descriptor')
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for d in descriptors:
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qualname = d.__objclass__.__qualname__ + '.' + d.__name__
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self.assertEqual(d.__qualname__, qualname)
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self.assertEqual(str.lower.__qualname__, 'str.lower')
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self.assertEqual(complex.real.__qualname__, 'complex.real')
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self.assertEqual(float.real.__qualname__, 'float.real')
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self.assertEqual(int.__add__.__qualname__, 'int.__add__')
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class DictProxyTests(unittest.TestCase):
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def setUp(self):
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class C(object):
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@ -670,17 +670,17 @@ class SizeofTest(unittest.TestCase):
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# complex
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check(complex(0,1), size(h + '2d'))
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# method_descriptor (descriptor object)
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check(str.lower, size(h + '2PP'))
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check(str.lower, size(h + '3PP'))
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# classmethod_descriptor (descriptor object)
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# XXX
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# member_descriptor (descriptor object)
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import datetime
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check(datetime.timedelta.days, size(h + '2PP'))
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check(datetime.timedelta.days, size(h + '3PP'))
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# getset_descriptor (descriptor object)
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import collections
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check(collections.defaultdict.default_factory, size(h + '2PP'))
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check(collections.defaultdict.default_factory, size(h + '3PP'))
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# wrapper_descriptor (descriptor object)
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check(int.__add__, size(h + '2P2P'))
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check(int.__add__, size(h + '3P2P'))
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# method-wrapper (descriptor object)
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check({}.__iter__, size(h + '2P'))
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# dict
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@ -9,6 +9,7 @@ descr_dealloc(PyDescrObject *descr)
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_PyObject_GC_UNTRACK(descr);
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Py_XDECREF(descr->d_type);
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Py_XDECREF(descr->d_name);
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Py_XDECREF(descr->d_qualname);
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PyObject_GC_Del(descr);
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}
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@ -321,6 +322,44 @@ method_get_doc(PyMethodDescrObject *descr, void *closure)
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return PyUnicode_FromString(descr->d_method->ml_doc);
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}
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static PyObject *
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calculate_qualname(PyDescrObject *descr)
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{
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PyObject *type_qualname, *res;
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_Py_IDENTIFIER(__qualname__);
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if (descr->d_name == NULL || !PyUnicode_Check(descr->d_name)) {
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PyErr_SetString(PyExc_TypeError,
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"<descriptor>.__name__ is not a unicode object");
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return NULL;
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}
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type_qualname = _PyObject_GetAttrId((PyObject *)descr->d_type,
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&PyId___qualname__);
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if (type_qualname == NULL)
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return NULL;
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if (!PyUnicode_Check(type_qualname)) {
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PyErr_SetString(PyExc_TypeError, "<descriptor>.__objclass__."
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"__qualname__ is not a unicode object");
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Py_XDECREF(type_qualname);
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return NULL;
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}
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res = PyUnicode_FromFormat("%S.%S", type_qualname, descr->d_name);
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Py_DECREF(type_qualname);
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return res;
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}
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static PyObject *
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descr_get_qualname(PyDescrObject *descr)
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{
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if (descr->d_qualname == NULL)
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descr->d_qualname = calculate_qualname(descr);
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Py_XINCREF(descr->d_qualname);
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return descr->d_qualname;
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}
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static PyMemberDef descr_members[] = {
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{"__objclass__", T_OBJECT, offsetof(PyDescrObject, d_type), READONLY},
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{"__name__", T_OBJECT, offsetof(PyDescrObject, d_name), READONLY},
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@ -329,6 +368,7 @@ static PyMemberDef descr_members[] = {
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static PyGetSetDef method_getset[] = {
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{"__doc__", (getter)method_get_doc},
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{"__qualname__", (getter)descr_get_qualname},
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{0}
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};
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@ -344,6 +384,7 @@ member_get_doc(PyMemberDescrObject *descr, void *closure)
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static PyGetSetDef member_getset[] = {
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{"__doc__", (getter)member_get_doc},
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{"__qualname__", (getter)descr_get_qualname},
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{0}
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};
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@ -359,6 +400,7 @@ getset_get_doc(PyGetSetDescrObject *descr, void *closure)
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static PyGetSetDef getset_getset[] = {
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{"__doc__", (getter)getset_get_doc},
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{"__qualname__", (getter)descr_get_qualname},
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{0}
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};
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@ -374,6 +416,7 @@ wrapperdescr_get_doc(PyWrapperDescrObject *descr, void *closure)
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static PyGetSetDef wrapperdescr_getset[] = {
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{"__doc__", (getter)wrapperdescr_get_doc},
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{"__qualname__", (getter)descr_get_qualname},
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{0}
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};
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@ -585,6 +628,7 @@ descr_new(PyTypeObject *descrtype, PyTypeObject *type, const char *name)
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Py_DECREF(descr);
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descr = NULL;
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}
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descr->d_qualname = NULL;
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}
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return descr;
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}
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@ -987,9 +1031,16 @@ wrapper_doc(wrapperobject *wp)
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}
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}
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static PyObject *
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wrapper_qualname(wrapperobject *wp)
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{
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return descr_get_qualname((PyDescrObject *)wp->descr);
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}
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static PyGetSetDef wrapper_getsets[] = {
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{"__objclass__", (getter)wrapper_objclass},
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{"__name__", (getter)wrapper_name},
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{"__qualname__", (getter)wrapper_qualname},
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{"__doc__", (getter)wrapper_doc},
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{0}
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};
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