Skip call to .tolist() when creating pd.Index (#10619)

y4n9squared · web-flow · commit 3c9217e2b382 · 2025-08-12T19:22:46.000-06:00
diff --git a/xarray/core/coordinates.py b/xarray/core/coordinates.py
@@ -177,7 +177,7 @@ def to_index(self, ordered_dims: Sequence[Hashable] | None = None) -> pd.Index:
 
                 # compute the cartesian product
                 code_list += [
-                    np.tile(np.repeat(code, repeat_counts[i]), tile_counts[i]).tolist()
+                    np.tile(np.repeat(code, repeat_counts[i]), tile_counts[i])
                     for code in codes
                 ]
                 level_list += levels

Original file line number	Diff line number	Diff line change
`@@ -177,7 +177,7 @@ def to_index(self, ordered_dims: Sequence[Hashable] \| None = None) -> pd.Index:`
`177`	`177`
`178`	`178`	`# compute the cartesian product`
`179`	`179`	`code_list += [`
`180`		`- np.tile(np.repeat(code, repeat_counts[i]), tile_counts[i]).tolist()`
	`180`	`+ np.tile(np.repeat(code, repeat_counts[i]), tile_counts[i])`
`181`	`181`	`for code in codes`
`182`	`182`	`]`
`183`	`183`	`level_list += levels`