fix exact_match and f1

metrics/exact_match.py

@@ -37,4 +37,4 @@ def compute_exact_match(predictions, references):
     exact_match = 0
     for prediction, ground_truths in zip(predictions, references):
         exact_match += metric_max_over_ground_truths(exact_match_score, prediction, ground_truths)
-    return 100.0 * exact_match / len(predictions)
+    return {"exact_match": 100.0 * exact_match / len(predictions)}

metrics/f1.py

@@ -53,4 +53,4 @@ def compute_f1(predictions, references):
     f1 = 0
     for prediction, ground_truths in zip(predictions, references):
         f1 += metric_max_over_ground_truths(f1_score, prediction, ground_truths)
-    return 100.0 * f1 / len(predictions)
+    return {"f1": 100.0 * f1 / len(predictions)}