Update wikipedia-nq.py

wikipedia-nq.py

@@ -90,7 +90,7 @@ class WikipediaNq(datasets.GeneratorBasedBuilder):
             datasets.SplitGenerator(
                 name=split,
                 gen_kwargs={
-                    "filepath": downloaded_files[split],
+                    "files": [downloaded_files[split]] if isinstance(downloaded_files[split], str) else downloaded_files[split],
                 },
             ) for split in downloaded_files
         ]