Update sci_lay.py

sci_lay.py

@@ -140,28 +140,24 @@ class SciLay(datasets.GeneratorBasedBuilder):
 
     def _generate_examples(self, paths=None):
         """Yields examples."""
-        dois_to_examples = {}  # Dictionary to store examples by DOI
+        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]
-                        example = {
-                            _DOI: json_obj[_DOI],
-                            _PMCID: json_obj[_PMCID],
-                            _SUMMARY: json_obj[_SUMMARY],
-                            _ABSTRACT: json_obj[_ABSTRACT],
-                            _JOURNAL: json_obj[_JOURNAL],
-                            _TOPICS: json_obj[_TOPICS],
-                            _KEYWORDS: json_obj[_KEYWORDS]
-                        }
-                        if doi not in dois_to_examples:
-                            dois_to_examples[doi] = []
-                        dois_to_examples[doi].append(example)
-        
-        for doi, examples in dois_to_examples.items():
-            yield doi, examples
-
+                        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],
+                                _JOURNAL: json_obj[_JOURNAL],
+                                _TOPICS: json_obj[_TOPICS],
+                                _KEYWORDS: json_obj[_KEYWORDS]
+                            }
+                            yield doi, example