Refactor code to extract ISCO codes from predictions and references

isco_hierarchical_accuracy.py

@@ -273,8 +273,14 @@ class ISCO_Hierarchical_Accuracy(evaluate.Metric):
         """Returns the accuracy scores."""
         # Convert the inputs to strings
         if len(predictions[0]) > 4:
-            predictions = [self._extract_isco_code(p) for p in predictions]
-            references = [self._extract_isco_code(r) for r in references]
+            extracted_predictions = []
+            extracted_references = []
+            for p in predictions:
+                extracted_predictions.append(self._extract_isco_code(p))
+            for r in references:
+                extracted_references.append(self._extract_isco_code(r))
+            predictions = extracted_predictions
+            references = extracted_references
         predictions = [str(p) for p in predictions]
         references = [str(r) for r in references]