From d5f4a97771cf205d3a0070676431f97b8f283007 Mon Sep 17 00:00:00 2001
From: Adam Turner <9087854+aa-turner@users.noreply.github.com>
Date: Sun, 19 Jan 2025 02:25:52 +0000
Subject: [PATCH] return cached module

---
 sphinx/ext/autodoc/importer.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sphinx/ext/autodoc/importer.py b/sphinx/ext/autodoc/importer.py
index c5cb9970513..e1e371ced5d 100644
--- a/sphinx/ext/autodoc/importer.py
+++ b/sphinx/ext/autodoc/importer.py
@@ -156,6 +156,9 @@ def unmangle(subject: Any, name: str) -> str | None:
 
 
 def import_module(modname: str, try_reload: bool = False) -> Any:
+    if modname in sys.modules:
+        return sys.modules[modname]
+
     original_module_names = frozenset(sys.modules)
     try:
         spec = find_spec(modname)