bpo-41730: Show deprecation warnings for tkinter.tix (GH-22186)

Co-authored-by: E-Paine <63801254+E-Paine@users.noreply.github.com>
Co-authored-by: Zachary Ware <zach@python.org>

Author: 3 people

Lib/test/test_tix.py

@@ -1,15 +1,17 @@
+import sys
 import unittest
 from test import support
 from test.support import import_helper
-import sys
 
 # Skip this test if the _tkinter module wasn't built.
 _tkinter = import_helper.import_module('_tkinter')
 
 # Skip test if tk cannot be initialized.
 support.requires('gui')
 
-from tkinter import tix, TclError
+# Suppress the deprecation warning
+tix = import_helper.import_module('tkinter.tix', deprecated=True)
+from tkinter import TclError
 
 
 class TestTix(unittest.TestCase):
@@ -24,9 +26,12 @@ def setUp(self):
         else:
             self.addCleanup(self.root.destroy)
 
-    def test_tix_available(self):
-        # this test is just here to make setUp run
-        pass
+    def test_tix_deprecation(self):
+        with self.assertWarns(DeprecationWarning):
+            import_helper.import_fresh_module(
+                'tkinter.tix',
+                fresh=('tkinter.tix',),
+                )
 
 
 if __name__ == '__main__':

Lib/tkinter/tix.py

@@ -21,13 +21,20 @@
 # Compare the demo tixwidgets.py to the original Tcl program and you will
 # appreciate the advantages.
 #
+# NOTE: This module is deprecated since Python 3.6.
 
 import os
+import warnings
 import tkinter
 from tkinter import *
 from tkinter import _cnfmerge
 
-import _tkinter # If this fails your Python may not be configured for Tk
+warnings.warn(
+    'The Tix Tk extension is unmaintained, and the tkinter.tix wrapper module'
+    ' is deprecated in favor of tkinter.ttk',
+    DeprecationWarning,
+    stacklevel=2,
+    )
 
 # Some more constants (for consistency with Tkinter)
 WINDOW = 'window'

Misc/NEWS.d/next/Library/2020-09-10-07-23-24.bpo-41730.DyKFi9.rst

@@ -0,0 +1 @@
+``DeprecationWarning`` is now raised when importing :mod:`tkinter.tix`, which has been deprecated in documentation since Python 3.6.