Refactored to allow ConceptEvaluator

sdp/sheerkaSerializer.py

@@ -5,6 +5,8 @@ import struct
 import io
 from dataclasses import dataclass
 import logging
+from enum import Enum
+
 import core.utils
 
 from core.concept import Concept
@@ -23,6 +25,9 @@ def json_default_converter(o):
     if isinstance(o, (datetime.date, datetime.datetime)):
         return o.isoformat()
 
+    if isinstance(o, Enum):
+        return o.key
+
 
 @dataclass()
 class SerializerContext: