Fixed parsing of BNF concepts mixed with isaset concepts

src/sheerkapickle/sheerka_handlers.py

@@ -4,7 +4,7 @@ from core.sheerka.services.SheerkaExecute import ParserInput
 from evaluators.BaseEvaluator import BaseEvaluator
 from parsers.BaseParser import BaseParser
 from sheerkapickle.handlers import BaseHandler, registry
-from core.concept import Concept, PROPERTIES_TO_SERIALIZE as CONCEPT_PROPERTIES_TO_SERIALIZE, ConceptParts
+from core.concept import Concept, PROPERTIES_TO_SERIALIZE as CONCEPT_PROPERTIES_TO_SERIALIZE, ConceptParts, NotInit
 from core.sheerka.ExecutionContext import ExecutionContext, PROPERTIES_TO_SERIALIZE as CONTEXT_PROPERTIES_TO_SERIALIZE
 
 default_concept = Concept()
@@ -67,7 +67,7 @@ class ConceptHandler(BaseHandler):
                 # get properties
                 for prop_name, prop_value in resolved_value:
                     key_to_use = ConceptParts(prop_name[7:]) if isinstance(prop_name, str) and prop_name.startswith("cParts.") else prop_name
-                    instance.set_value(key_to_use, prop_value)
+                    instance.set_value(key_to_use, NotInit if prop_value is None else prop_value)
             else:
                 raise Exception("Sanity check as it's not possible yet")