gh-126705: Make os.PathLike more like a protocol (#126706)

it can now be used as a base class in other protocols

Lib/test/test_typing.py

@@ -8,6 +8,7 @@ import gc
 import inspect
 import itertools
 import operator
+import os
 import pickle
 import re
 import sys
@@ -4252,6 +4253,9 @@ class ProtocolTests(BaseTestCase):
             class CustomProtocol(TestCase, Protocol):
                 pass
 
+        class CustomPathLikeProtocol(os.PathLike, Protocol):
+            pass
+
         class CustomContextManager(typing.ContextManager, Protocol):
             pass
 

Lib/typing.py

@@ -1944,6 +1944,7 @@ _PROTO_ALLOWLIST = {
         'Reversible', 'Buffer',
     ],
     'contextlib': ['AbstractContextManager', 'AbstractAsyncContextManager'],
+    'os': ['PathLike'],
 }
 
 

Misc/NEWS.d/next/Library/2024-11-11-14-52-21.gh-issue-126705.0W7jFW.rst

@@ -0,0 +1 @@
+Allow :class:`os.PathLike` to be a base for Protocols.