From 21e0223bc5a9f5ecf1b681840b63c3b843d930f8 Mon Sep 17 00:00:00 2001
From: "Thorvald M. Ballestad" <thorvald@simula.no>
Date: Mon, 12 Aug 2024 10:39:48 +0200
Subject: [PATCH] Use Optional not X | None

---
 src/dvc_data/index/diff.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/dvc_data/index/diff.py b/src/dvc_data/index/diff.py
index a40bd810..40fd5eb8 100644
--- a/src/dvc_data/index/diff.py
+++ b/src/dvc_data/index/diff.py
@@ -264,7 +264,7 @@ def _get_key(change):
     deleted.sort(key=_get_key)
 
     # Create a dictionary for fast lookup of deletions by hash_info
-    deleted_dict: dict[HashInfo | None, deque[Change]] = defaultdict(deque)
+    deleted_dict: dict[Optional[HashInfo], deque[Change]] = defaultdict(deque)
     for change in deleted:
         # We checked change.old for all deleted above, so cast
         change_hash = cast(DataIndexEntry, change.old).hash_info