Revert "删除不必要的东西"

This reverts commit 73dd1be447.

problem/serizalizers.py

@@ -14,6 +14,7 @@ class ProblemSampleSerializer(serializers.ListField):
 
 class JSONField(serializers.Field):
     def to_representation(self, value):
+        print value, type(value)
         return json.loads(value)