Add logging + edit dl_manager for image-segmentation

This: `train_data = dl_manager.iter_files(data_files["train"]), dl_manager.iter_files(data_files["train_mask"])` for: ` train_data = dl_manager.iter_files([data_files["train"]]), dl_manager.iter_files([data_files["train_mask"]])`
`

rock-glacier-dataset.py

@@ -19,6 +19,9 @@ import re
 import datasets
 from datasets.tasks import ImageClassification
 
+logger = datasets.logging.get_logger(__name__)
+
+
 _HOMEPAGE = "https://github.com/alcazar90/rock-glacier-detection"
 
 
@@ -111,7 +114,7 @@ class RockGlacierDataset(datasets.GeneratorBasedBuilder):
            ]
            
        if self.config.name == "image-segmentation":
-          train_data = dl_manager.iter_files(data_files["train"]), dl_manager.iter_files(data_files["train_mask"])
+          train_data = dl_manager.iter_files([data_files["train"]]), dl_manager.iter_files([data_files["train_mask"]])
           return [
              datasets.SplitGenerator(
                 name=datasets.Split.TRAIN,
@@ -140,7 +143,8 @@ class RockGlacierDataset(datasets.GeneratorBasedBuilder):
             # iterate trought masks
             for mask_path in masks:
                mask_id = re.search('\d+', mask_path).group(0)
-               imageId2mask[mask_id] = mask_path     
+               imageId2mask[mask_id] = mask_path
+            logger.info(f"imageId2mask check paths: {imageId2mask}")     
             for i, path in enumerate(files):
                file_name = os.path.basename(path)
                if file_name.endswith(".png"):