iterator adjustments

ark_example.py

@@ -155,7 +155,7 @@ class ArkExample(datasets.GeneratorBasedBuilder):
                 
                 image_data = tifffile.imread(fp, key=0)
                 if self.config.name == "base_dataset":
-                    yield fp.stem(), {
+                    yield fp, {
                         "chan": image_data,
                         "path": fp
                     }