AA-Turner · Aug 10, 2024 · Feb 22, 2024 · Feb 22, 2024 · Feb 22, 2024 · Feb 22, 2024
diff --git a/Doc/library/operator.rst b/Doc/library/operator.rst
@@ -80,6 +80,13 @@ truth tests, identity tests, and boolean operations:
    Return ``a is not b``.  Tests object identity.
 
 
+.. function:: is_none(a)
+
+   Return ``a is None``.  Tests object identity.
+
+   .. versionadded:: 3.13
+
+
 The mathematical and bitwise operations are the most numerous:
 
 
@@ -405,6 +412,8 @@ Python syntax and the functions in the :mod:`operator` module.
 +-----------------------+-------------------------+---------------------------------------+
 | Identity              | ``a is not b``          | ``is_not(a, b)``                      |
 +-----------------------+-------------------------+---------------------------------------+
+| Identity              | ``a is None``           | ``is_none(a)``                        |
++-----------------------+-------------------------+---------------------------------------+
 | Indexed Assignment    | ``obj[k] = v``          | ``setitem(obj, k, v)``                |
 +-----------------------+-------------------------+---------------------------------------+
 | Indexed Deletion      | ``del obj[k]``          | ``delitem(obj, k)``                   |

diff --git a/Doc/whatsnew/3.13.rst b/Doc/whatsnew/3.13.rst
@@ -896,6 +896,13 @@ opcode
   documented or exposed through ``dis``, and were not intended to be
   used externally.
 
+operator
+--------
+
+* A new function ``operator.is_none`` has been added, such that
+  ``operator.is_none(obj)`` is equivalent to ``obj is None``.
+  (Contributed by Raymond Hettinger and Nico Mexis in :gh:`115808`.)
+
 os
 --
 

diff --git a/Lib/operator.py b/Lib/operator.py
@@ -14,7 +14,7 @@
            'delitem', 'eq', 'floordiv', 'ge', 'getitem', 'gt', 'iadd', 'iand',
            'iconcat', 'ifloordiv', 'ilshift', 'imatmul', 'imod', 'imul',
            'index', 'indexOf', 'inv', 'invert', 'ior', 'ipow', 'irshift',
-           'is_', 'is_not', 'isub', 'itemgetter', 'itruediv', 'ixor', 'le',
+           'is_', 'is_none', 'is_not', 'isub', 'itemgetter', 'itruediv', 'ixor', 'le',
            'length_hint', 'lshift', 'lt', 'matmul', 'methodcaller', 'mod',
            'mul', 'ne', 'neg', 'not_', 'or_', 'pos', 'pow', 'rshift',
            'setitem', 'sub', 'truediv', 'truth', 'xor']
@@ -66,6 +66,10 @@ def is_not(a, b):
     "Same as a is not b."
     return a is not b
 
+def is_none(a):
+    "Same as a is None."
+    return a is None
+
 # Mathematical/Bitwise Operations *********************************************#
 
 def abs(a):

diff --git a/Lib/test/test_operator.py b/Lib/test/test_operator.py
@@ -347,6 +347,16 @@ def test_is_not(self):
         self.assertFalse(operator.is_not(a, b))
         self.assertTrue(operator.is_not(a,c))
 
+    def test_is_none(self):
+        operator = self.module
+        a = 'xyzpdq'
+        b = ''
+        c = None
+        self.assertRaises(TypeError, operator.is_none)
+        self.assertFalse(operator.is_none(a))
+        self.assertFalse(operator.is_none(b))
+        self.assertTrue(operator.is_none(c))
+
     def test_attrgetter(self):
         operator = self.module
         class A:

diff --git a/Misc/NEWS.d/next/Library/2024-02-22-10-12-59.gh-issue-115808.F2g2Ku.rst b/Misc/NEWS.d/next/Library/2024-02-22-10-12-59.gh-issue-115808.F2g2Ku.rst
@@ -0,0 +1 @@
+Add :func:`operator.is_none` function.
diff --git a/Modules/_operator.c b/Modules/_operator.c
@@ -728,6 +728,20 @@ _operator_is_not_impl(PyObject *module, PyObject *a, PyObject *b)
     return Py_NewRef(result);
 }
 
+/*[clinic input]
+_operator.is_none = _operator.neg
+
+Same as a is None.
+[clinic start generated code]*/
+
+static PyObject *
+_operator_is_none(PyObject *module, PyObject *a)
+/*[clinic end generated code: output=07159cc102261dec input=0448b38af7b8533d]*/
+{
+    PyObject *result = Py_IsNone(a) ? Py_True : Py_False;
+    return Py_NewRef(result);
+}
+
 /* compare_digest **********************************************************/
 
 /*
@@ -916,6 +930,7 @@ static struct PyMethodDef operator_methods[] = {
     _OPERATOR_COUNTOF_METHODDEF
     _OPERATOR_IS__METHODDEF
     _OPERATOR_IS_NOT_METHODDEF
+    _OPERATOR_IS_NONE_METHODDEF
     _OPERATOR_INDEX_METHODDEF
     _OPERATOR_ADD_METHODDEF
     _OPERATOR_SUB_METHODDEF

diff --git a/Modules/clinic/_operator.c.h b/Modules/clinic/_operator.c.h