Update sci_lay.py

sci_lay.py

@@ -143,9 +143,9 @@ class SciLay(datasets.GeneratorBasedBuilder):
         for paths_per_journal in paths:
             for path in paths_per_journal:
                 with open(path, "rb") as fin:
-                    for row in fin:
+                    for index, row in enumerate(fin):
                         json_obj = json.loads(row)
-                        yield {
+                        yield index, {
                             _DOI: json_obj[_DOI],
                             _PMCID: json_obj[_PMCID],
                             _SUMMARY: json_obj[_SUMMARY],
@@ -154,3 +154,6 @@ class SciLay(datasets.GeneratorBasedBuilder):
                             _TOPICS: json_obj[_TOPICS],
                             _KEYWORDS: json_obj[_KEYWORDS]
                         }
+
+
+