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[3.9] bpo-45449: add note about PEP 585 in's documentation (GH-29047) (GH-29068)
commit: a18e4e9c15a0be833e01c3892206661fc91e6918
branch: 3.9
author: ?ukasz Langa <>
committer: ambv <>
date: 2021-10-19T20:50:09+02:00

[3.9] bpo-45449: add note about PEP 585 in's documentation (GH-29047) (GH-29068)

Signed-off-by: Filipe Laíns <>

Co-authored-by: ?ukasz Langa <>.
(cherry picked from commit 7bafa0cf586227987d3d662264d491e3780024b7)

Co-authored-by: Filipe Laíns <>

A Misc/NEWS.d/next/Documentation/2021-10-19-01-41-40.bpo-45449.fjHZJc.rst
M Doc/library/

diff --git a/Doc/library/ b/Doc/library/
index 2345e78a17e4f..cb4f767097169 100644
--- a/Doc/library/
+++ b/Doc/library/
@@ -24,6 +24,9 @@ This module provides :term:`abstract base classes <abstract base class>` that
can be used to test whether a class provides a particular interface; for
example, whether it is hashable or whether it is a mapping.

+.. versionadded:: 3.9
+ These abstract classes now support ``[]``. See :ref:`types-genericalias`
+ and :pep:`585`.

.. _collections-abstract-base-classes:

diff --git a/Misc/NEWS.d/next/Documentation/2021-10-19-01-41-40.bpo-45449.fjHZJc.rst b/Misc/NEWS.d/next/Documentation/2021-10-19-01-41-40.bpo-45449.fjHZJc.rst
new file mode 100644
index 0000000000000..fb817757a1487
--- /dev/null
+++ b/Misc/NEWS.d/next/Documentation/2021-10-19-01-41-40.bpo-45449.fjHZJc.rst
@@ -0,0 +1 @@
+Add note about :pep:`585` in :mod:``.

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