Update action_generation.py to prevent zero division

action_generation.py

@@ -84,7 +84,7 @@ class BaseEvaluater:
             fn += len(set(label) - set(pred))
         precision = tp / (tp + fp + self.eps)
         recall = tp / (tp + fn + self.eps)
-        f1 = 2 * precision * recall / (precision + recall)
+        f1 = 2 * precision * recall / (precision + recall + self.eps)
 
         return {
             "precision": round(precision, 4),