diff --git a/Lib/typing.py b/Lib/typing.py
index ed1dd4fc6413a5..e8a61e64833602 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -1860,7 +1860,9 @@ def _allow_reckless_class_checks(depth=2):
The abc and functools modules indiscriminately call isinstance() and
issubclass() on the whole MRO of a user class, which may contain protocols.
"""
- return _caller(depth) in {'abc', 'functools', None}
+ # gh-136047: When `_abc` module is not available, `_py_abc` is required to
+ # allow `_py_abc.ABCMeta` fallback.
+ return _caller(depth) in {'abc', '_py_abc', 'functools', None}
_PROTO_ALLOWLIST = {
diff --git a/Misc/NEWS.d/next/Library/2025-07-05-06-59-46.gh-issue-136047.qWvycf.rst b/Misc/NEWS.d/next/Library/2025-07-05-06-59-46.gh-issue-136047.qWvycf.rst
new file mode 100644
index 00000000000000..1a381860914bc3
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-07-05-06-59-46.gh-issue-136047.qWvycf.rst
@@ -0,0 +1,2 @@
+Fix issues with :mod:`typing` when the C implementation of :mod:`abc` is not
+available.
pFad - Phonifier reborn
Pfad - The Proxy pFad of © 2024 Garber Painting. All rights reserved.
Note: This service is not intended for secure transactions such as banking, social media, email, or purchasing. Use at your own risk. We assume no liability whatsoever for broken pages.
Alternative Proxies:
Alternative Proxy
pFad Proxy
pFad v3 Proxy
pFad v4 Proxy