typesystem: don't raise exception if conceptAttributes is missing

Author: mikix

ctakesclient/typesystem.py

@@ -166,7 +166,7 @@ def from_json(self, source: dict):
         self.conceptAttributes = []
 
         # sort list of concepts ensuring same ordering
-        unsorted = list(UmlsConcept(c) for c in source.get('conceptAttributes'))
+        unsorted = list(UmlsConcept(c) for c in source.get('conceptAttributes', []))
 
         for c in MatchText.sort_concepts(unsorted):
             self.conceptAttributes.append(c)