From a56180fb5f572b5280757d1f79a3df9499a81ae7 Mon Sep 17 00:00:00 2001
From: Gouvernathor <44340603+Gouvernathor@users.noreply.github.com>
Date: Sat, 1 Jul 2023 17:47:32 +0200
Subject: [PATCH] Document the __signature__ attribute

---
 Doc/library/inspect.rst | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Doc/library/inspect.rst b/Doc/library/inspect.rst
index 7884308a333020..27dba1e5de3130 100644
--- a/Doc/library/inspect.rst
+++ b/Doc/library/inspect.rst
@@ -640,6 +640,9 @@ function.
    Accepts a wide range of Python callables, from plain functions and classes to
    :func:`functools.partial` objects.
 
+   If the passed object has a ``__signature__`` attribute, this function
+   returns it without further computations.
+
    For objects defined in modules using stringized annotations
    (``from __future__ import annotations``), :func:`signature` will
    attempt to automatically un-stringize the annotations using
@@ -760,6 +763,8 @@ function.
          sig = MySignature.from_callable(min)
          assert isinstance(sig, MySignature)
 
+       Its behavior is otherwise identical to that of :func:`signature`.
+
        .. versionadded:: 3.5
 
        .. versionadded:: 3.10