reader handles axes as None, List of str or List of dict

ome_zarr/reader.py

@@ -275,17 +275,14 @@ def matches(zarr: ZarrLocation) -> bool:
     def __init__(self, node: Node) -> None:
         super().__init__(node)
 
-        axes_values = {"t", "c", "z", "y", "x"}
         try:
             multiscales = self.lookup("multiscales", [])
             version = multiscales[0].get(
                 "version", "0.1"
             )  # should this be matched with Format.version?
             datasets = multiscales[0]["datasets"]
-            # axes field was introduced in 0.3, before all data was 5d
-            axes = tuple(multiscales[0].get("axes", ["t", "c", "z", "y", "x"]))
-            if len(set(axes) - axes_values) > 0:
-                raise RuntimeError(f"Invalid axes names: {set(axes) - axes_values}")
+            axes = multiscales[0].get("axes")
+            # TODO - convert each axis to dictionary (if str or None)?
             node.metadata["axes"] = axes
             datasets = [d["path"] for d in datasets]
             self.datasets: List[str] = datasets
@@ -301,6 +298,10 @@ def __init__(self, node: Node) -> None:
                 for c in data.chunks
             ]
             LOGGER.info("resolution: %s", resolution)
+            if axes is not None:
+                axes = tuple(
+                    axis if isinstance(axis, str) else axis.get("name") for axis in axes
+                )
             LOGGER.info(" - shape %s = %s", axes, data.shape)
             LOGGER.info(" - chunks =  %s", chunk_sizes)
             LOGGER.info(" - dtype = %s", data.dtype)