gh-91217: deprecate nis

Doc/whatsnew/3.11.rst

@@ -875,6 +875,7 @@ Deprecated
   * :mod:`crypt`
   * :mod:`imghdr`
   * :mod:`msilib`
+  * :mod:`nis`
   * :mod:`nntplib`
 
   (Contributed by Brett Cannon in :issue:`47061`.)

Lib/test/test_nis.py

@@ -1,10 +1,13 @@
 from test import support
 from test.support import import_helper
 import unittest
+import warnings
 
 
 # Skip test if nis module does not exist.
-nis = import_helper.import_module('nis')
+with warnings.catch_warnings():
+    warnings.simplefilter("ignore", DeprecationWarning)
+    nis = import_helper.import_module('nis')
 
 
 class NisTests(unittest.TestCase):

Misc/NEWS.d/next/Library/2022-04-16-09-33-14.gh-issue-91217.nt9JFs.rst

@@ -0,0 +1 @@
+Deprecate the nis module.

Modules/nismodule.c

@@ -524,5 +524,11 @@ static struct PyModuleDef nismodule = {
 PyMODINIT_FUNC
 PyInit_nis(void)
 {
+    if (PyErr_WarnEx(PyExc_DeprecationWarning,
+                     "'nis' is deprecated and slated for removal in "
+                     "Python 3.13",
+                     7)) {
+        return NULL;
+    }
     return PyModuleDef_Init(&nismodule);
 }