From d7ea4e50a479e746761db71122a9a00ed7a9a5aa Mon Sep 17 00:00:00 2001
From: Trevor James Smith <10819524+Zeitsperre@users.noreply.github.com>
Date: Wed, 23 Oct 2024 15:34:01 -0400
Subject: [PATCH] use older static typing

---
 src/rook/utils/atlas_fixes.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/rook/utils/atlas_fixes.py b/src/rook/utils/atlas_fixes.py
index d62c59d..a2ba1b4 100644
--- a/src/rook/utils/atlas_fixes.py
+++ b/src/rook/utils/atlas_fixes.py
@@ -1,3 +1,5 @@
+from typing import Union
+
 import xarray as xr
 
 
@@ -13,7 +15,7 @@ def add_project_id(ds_id, ds):
     return ds
 
 
-def fix_deflation(ds: xr.Dataset | xr.DataArray):
+def fix_deflation(ds: Union[xr.Dataset, xr.DataArray]):
     """See also: clisops.ops.base_operaton._remove_redundant_fill_values"""
     if isinstance(ds, xr.Dataset):
         var_list = list(ds.coords) + list(ds.data_vars)