Avoid extra read from disk when creating Pandas Index. (#8893)

* Avoid extra read from disk when creating Pandas Index. * Update xarray/core/indexes.py Co-authored-by: Maximilian Roos <[email protected]> --------- Co-authored-by: Maximilian Roos <[email protected]>
pydata · May 7, 2024 · 322e670 · 322e670
1 parent 4e9d557
commit 322e670
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/xarray/core/indexes.py b/xarray/core/indexes.py
@@ -632,7 +632,8 @@ def from_variables(
         # the checks below.
 
         # preserve wrapped pd.Index (if any)
-        data = getattr(var._data, "array", var.data)
+        # accessing `.data` can load data from disk, so we only access if needed
+        data = getattr(var._data, "array") if hasattr(var._data, "array") else var.data
         # multi-index level variable: get level index
         if isinstance(var._data, PandasMultiIndexingAdapter):
             level = var._data.level