From 2a589c09b2a2f6c17f86dd6ed7db0614af131153 Mon Sep 17 00:00:00 2001
From: David Smith <39445562+smithdc1@users.noreply.github.com>
Date: Tue, 26 Dec 2023 06:33:22 +0000
Subject: [PATCH] Prefer ``sys.version_info`` for feature checks (#11736)

---
 sphinx/cmd/make_mode.py | 6 +++---
 sphinx/config.py        | 7 ++++---
 sphinx/util/typing.py   | 6 +++---
 3 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/sphinx/cmd/make_mode.py b/sphinx/cmd/make_mode.py
index 8b26d9d2e..ee237ae15 100644
--- a/sphinx/cmd/make_mode.py
+++ b/sphinx/cmd/make_mode.py
@@ -25,9 +25,9 @@ from sphinx.util.console import (  # type: ignore[attr-defined]
 )
 from sphinx.util.osutil import rmtree
 
-try:
-    from contextlib import chdir  # type: ignore[attr-defined]
-except ImportError:
+if sys.version_info >= (3, 11):
+    from contextlib import chdir
+else:
     from sphinx.util.osutil import _chdir as chdir
 
 if TYPE_CHECKING:
diff --git a/sphinx/config.py b/sphinx/config.py
index 405ca5e8d..92443d289 100644
--- a/sphinx/config.py
+++ b/sphinx/config.py
@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+import sys
 import time
 import traceback
 import types
@@ -14,9 +15,9 @@ from sphinx.util import logging
 from sphinx.util.osutil import fs_encoding
 from sphinx.util.typing import NoneType
 
-try:
-    from contextlib import chdir  # type: ignore[attr-defined]
-except ImportError:
+if sys.version_info >= (3, 11):
+    from contextlib import chdir
+else:
     from sphinx.util.osutil import _chdir as chdir
 
 if TYPE_CHECKING:
diff --git a/sphinx/util/typing.py b/sphinx/util/typing.py
index 955ad4a35..ae664cecb 100644
--- a/sphinx/util/typing.py
+++ b/sphinx/util/typing.py
@@ -15,9 +15,9 @@ from docutils.parsers.rst.states import Inliner
 if TYPE_CHECKING:
     import enum
 
-try:
-    from types import UnionType  # type: ignore[attr-defined] # python 3.10 or above
-except ImportError:
+if sys.version_info >= (3, 10):
+    from types import UnionType
+else:
     UnionType = None
 
 # classes that have incorrect __module__