Stop returning None from judge prediction function (kyuridenamida#179)

kyuridenamida · web-flow · commit c8f0be88729b · 2020-01-04T02:09:26.000+09:00
diff --git a/atcodertools/constprediction/constants_prediction.py b/atcodertools/constprediction/constants_prediction.py
@@ -108,7 +108,7 @@ def predict_yes_no(html: str) -> Tuple[Optional[str], Optional[str]]:
     return yes_str, no_str
 
 
-def predict_judge_method(html: str) -> Optional[Judge]:
+def predict_judge_method(html: str) -> Judge:
     def normalize(sentence):
         return sentence.replace('\\', '').replace("{", "").replace("}", "").replace(",", "").replace(" ", "").replace(
             "−", "-").lower().strip()
@@ -151,7 +151,8 @@ def normalize(sentence):
                     decimal_val_cands.add(int(t))
 
         if len(decimal_val_cands) == 0:
-            return None
+            # No error value candidate is found
+            return NormalJudge()
 
         if len(decimal_val_cands) == 1:
             if is_absolute and is_relative:
