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-rw-r--r--Lib/test/test_descr.py5
-rw-r--r--Misc/NEWS4
-rw-r--r--Objects/typeobject.c4
3 files changed, 9 insertions, 4 deletions
diff --git a/Lib/test/test_descr.py b/Lib/test/test_descr.py
index 82dcc2c..320a7a7 100644
--- a/Lib/test/test_descr.py
+++ b/Lib/test/test_descr.py
@@ -289,6 +289,11 @@ class OperatorsTest(unittest.TestCase):
self.assertEqual(repr(a), "234.5")
self.assertEqual(a.prec, 12)
+ def test_explicit_reverse_methods(self):
+ # see issue 9930
+ self.assertEqual(complex.__radd__(3j, 4.0), complex(4.0, 3.0))
+ self.assertEqual(float.__rsub__(3.0, 1), -2.0)
+
@support.impl_detail("the module 'xxsubtype' is internal")
def test_spam_lists(self):
# Testing spamlist operations...
diff --git a/Misc/NEWS b/Misc/NEWS
index d46f6b1..723c47b 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,10 @@ What's New in Python 3.1.3?
Core and Builtins
-----------------
+- Issue #9930: Remove bogus subtype check that was causing (e.g.)
+ float.__rdiv__(2.0, 3) to return NotImplemented instead of the
+ expected 1.5.
+
- Issue #9804: ascii() now always represents unicode surrogate pairs as
a single ``\UXXXXXXXX``, regardless of whether the character is printable
or not. Also, the "backslashreplace" error handler now joins surrogate
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index d2124f1..ab942c0 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -4049,10 +4049,6 @@ wrap_binaryfunc_r(PyObject *self, PyObject *args, void *wrapped)
if (!check_num_args(args, 1))
return NULL;
other = PyTuple_GET_ITEM(args, 0);
- if (!PyType_IsSubtype(Py_TYPE(other), Py_TYPE(self))) {
- Py_INCREF(Py_NotImplemented);
- return Py_NotImplemented;
- }
return (*func)(other, self);
}