add edge case if models to check is empty

predictors.py

@@ -273,6 +273,9 @@ def predict_1on1_single(input, model):
 
 def predict_1on1_scores(input, models):
 
+    if len(models) == 0:
+        return {}
+
     print(f"Models to Test: {models}")
     # BC SCORE
     bc_scores = []