Update sci_lay.py

sci_lay.py

@@ -139,14 +139,18 @@ class SciLay(datasets.GeneratorBasedBuilder):
             ]
 
     def _generate_examples(self, paths=None):
-        """Yields examples."""
-        for paths_per_journal in paths:
-            for path in paths_per_journal:
-                with open(path, "rb") as fin:
-                    for row in fin:
-                        json_obj = json.loads(row)
-                        yield json_obj["doi"], {
-                            _DOI: json_obj[_DOI],
+    """Yields examples."""
+    unique_dois = set()  # To keep track of unique DOIs
+    for paths_per_journal in paths:
+        for path in paths_per_journal:
+            with open(path, "rb") as fin:
+                for row in fin:
+                    json_obj = json.loads(row)
+                    doi = json_obj[_DOI]
+                    if doi not in unique_dois:
+                        unique_dois.add(doi)
+                        example = {
+                            _DOI: doi,
                             _PMCID: json_obj[_PMCID],
                             _SUMMARY: json_obj[_SUMMARY],
                             _ABSTRACT: json_obj[_ABSTRACT],
@@ -154,4 +158,6 @@ class SciLay(datasets.GeneratorBasedBuilder):
                             _TOPICS: json_obj[_TOPICS],
                             _KEYWORDS: json_obj[_KEYWORDS]
                         }
+                        yield doi, example
+