gh-123341: Support tkinter.Event type subcript (#123353)

Co-authored-by: Kirill Podoprigora <[email protected]>

Author: yowoda

Lib/test/test_genericalias.py

@@ -57,6 +57,10 @@
 from weakref import WeakSet, ReferenceType, ref
 import typing
 from typing import Unpack
+try:
+    from tkinter import Event
+except ImportError:
+    Event = None
 
 from typing import TypeVar
 T = TypeVar('T')
@@ -139,6 +143,8 @@ class BaseTest(unittest.TestCase):
     if ValueProxy is not None:
         generic_types.extend((ValueProxy, DictProxy, ListProxy, ApplyResult,
                               MPSimpleQueue, MPQueue, MPJoinableQueue))
+    if Event is not None:
+        generic_types.append(Event)
 
     def test_subscriptable(self):
         for t in self.generic_types:

Lib/tkinter/__init__.py

@@ -295,6 +295,8 @@ def __repr__(self):
             ''.join(' %s=%s' % (k, attrs[k]) for k in keys if k in attrs)
         )
 
+    __class_getitem__ = classmethod(types.GenericAlias)
+
 
 _support_default_root = True
 _default_root = None

Misc/NEWS.d/next/Library/2024-08-27-10-30-37.gh-issue-123341.5e-fjt.rst

@@ -0,0 +1 @@
+Add :meth:`~object.__class_getitem__` to :class:`!tkinter.Event` for type subscript support at runtime. Patch by Adonis Rakateli.