From 787aa3b1354a0611983fec04737ad63cedc28e59 Mon Sep 17 00:00:00 2001 From: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com> Date: Sun, 4 Apr 2021 23:14:44 +0800 Subject: [PATCH] bpo-41370: Add note about ForwardRefs and PEP585 generic types in docs (GH-25183) (cherry picked from commit 2b5913b4ee5852a28ca1509478f5582beb3aff7b) Co-authored-by: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com> --- Doc/library/typing.rst | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/Doc/library/typing.rst b/Doc/library/typing.rst index 688564f1d24f51..b136da00a070ad 100644 --- a/Doc/library/typing.rst +++ b/Doc/library/typing.rst @@ -1710,10 +1710,15 @@ Introspection helpers .. class:: ForwardRef A class used for internal typing representation of string forward references. - For example, ``list["SomeClass"]`` is implicitly transformed into - ``list[ForwardRef("SomeClass")]``. This class should not be instantiated by + For example, ``List["SomeClass"]`` is implicitly transformed into + ``List[ForwardRef("SomeClass")]``. This class should not be instantiated by a user, but may be used by introspection tools. + .. note:: + :pep:`585` generic types such as ``list["SomeClass"]`` will not be + implicitly transformed into ``list[ForwardRef("SomeClass")]`` and thus + will not automatically resolve to ``list[SomeClass]``. + .. versionadded:: 3.7.4 Constant