Casefold metadata key before sorting

lkluft · lkluft · commit 83833bdfed15 · 2025-07-25T11:51:29.000+02:00
diff --git a/src/zarr/core/group.py b/src/zarr/core/group.py
@@ -146,7 +146,10 @@ def to_dict(self) -> dict[str, JSON]:
                 k: v.to_dict()
                 for k, v in sorted(
                     self.flattened_metadata.items(),
-                    key=lambda item: (item[0].count("/"), unicodedata.normalize("NFKC", item[0])),
+                    key=lambda item: (
+                        item[0].count("/"),
+                        unicodedata.normalize("NFKC", item[0]).casefold(),
+                    ),
                 )
             },
         }

Original file line number	Diff line number	Diff line change
`@@ -146,7 +146,10 @@ def to_dict(self) -> dict[str, JSON]:`
`146`	`146`	`k: v.to_dict()`
`147`	`147`	`for k, v in sorted(`
`148`	`148`	`self.flattened_metadata.items(),`
`149`		`- key=lambda item: (item[0].count("/"), unicodedata.normalize("NFKC", item[0])),`
	`149`	`+ key=lambda item: (`
	`150`	`+ item[0].count("/"),`
	`151`	`+ unicodedata.normalize("NFKC", item[0]).casefold(),`
	`152`	`+ ),`
`150`	`153`	`)`
`151`	`154`	`},`
`152`	`155`	`}`