add list

signwriting_similarity.py

@@ -134,6 +134,10 @@ class SignWritingSimilarity(evaluate.Metric):
         )
 
     def _compute(self, predictions, references):
+        # if only one reference is provided make sure we still use list of lists
+        if isinstance(references[0], str):
+            references = [[ref] for ref in references]
+
         score = self.metric.corpus_score(predictions, references)
 
         return {"score": score}