convert np.str_ to python str (#25)

Author: TimMonko

src/ndevio/nimage.py

@@ -285,7 +285,11 @@ def get_napari_metadata(
         # Build metadata under various condition
         # add channel_axis if unpacking channels as layers
         if IS_MULTICHANNEL:
-            channel_names = self.napari_data.coords[CHANNEL_DIM].data.tolist()
+            # Convert to plain Python strings to avoid numpy string types (NumPy 2.0+)
+            channel_names = [
+                str(c)
+                for c in self.napari_data.coords[CHANNEL_DIM].data.tolist()
+            ]
 
             if self.settings.ndevio_Reader.unpack_channels_as_layers:
                 meta["channel_axis"] = self.napari_data.dims.index(CHANNEL_DIM)

tests/test_nimage.py

@@ -207,7 +207,6 @@ def test_get_napari_image_data_mosaic_tile_not_in_memory(
             None,
         ),  # OME-TIFF works with bioio-ome-tiff (core)
         (CZI_FILE, False, "bioio-czi"),  # CZI needs bioio-czi plugin
-        # RGB_TIFF now works with bioio-tifffile (core)
         (RGB_TIFF, True, None),
     ],
 )
@@ -260,7 +259,7 @@ def test_determine_reader_plugin_behavior(
         (LOGO_PNG, True, None),
         (CELLS3D2CH_OME_TIFF, True, None),
         (CZI_FILE, False, ["bioio-czi", "Zeiss CZI files"]),
-        (RGB_TIFF, True, None),  # Now works with bioio-tifffile (core)
+        (RGB_TIFF, True, None),
     ],
 )
 def test_nimage_init_with_various_formats(