Data subset remote file download fix.

korpus_malti.py

@@ -1,5 +1,6 @@
 import json
 import os
+import urllib
 from pathlib import Path
 
 import datasets
@@ -174,8 +175,11 @@ class KorpusMalti(datasets.GeneratorBasedBuilder):
         else:
             file_pattern = _SUBSET_URL_PATTERN.format(self.config.name)
             base_path = self.base_path or ""
-            file_paths = [path.relative_to(base_path)
-                          for path in Path(os.path.join(base_path, _URL)).glob(file_pattern)]
+            if urllib.parse.urlparse(base_path).scheme in ("http", "https"):  # pre-determined files
+                file_paths = list(self.info.download_checksums.keys())
+            else:  # dynamically change depending on locally available files.
+                file_paths = [path.relative_to(base_path)
+                              for path in Path(os.path.join(base_path, _URL)).glob(file_pattern)]
 
             data_files = dl_manager.download_and_extract(file_paths)
             data_split = [