Add filename to each text row

BabyLM.py

@@ -44,6 +44,7 @@ class BabyLM(datasets.GeneratorBasedBuilder):
             features = datasets.Features(
                 {
                     "text": datasets.Value("string"),
+                    "filename": datasets.Value("string"),
                 }
             )
             return datasets.DatasetInfo(
@@ -106,6 +107,7 @@ class BabyLM(datasets.GeneratorBasedBuilder):
 
         for filepath in filepaths:
             with open(filepath, encoding="utf-8") as f:
+                filename = filepath.split("/")[-1]
                 for row in f:
-                    yield global_idx, {"text": row}
+                    yield global_idx, {"text": row, "filename": filename}
                     global_idx += 1