Enhanced ExecutionContext to keep track of the execution flow

tests/test_sheerka_non_reg.py

@@ -1,15 +1,14 @@
-import pytest
 import os
-from os import path
 import shutil
+from os import path
 
-from core.builtin_concepts import BuiltinConcepts, ReturnValueConcept
+import pytest
+
+from core.builtin_concepts import BuiltinConcepts
 from core.concept import Concept, PROPERTIES_TO_SERIALIZE, Property
 from core.sheerka import Sheerka, ExecutionContext
 from evaluators.MutipleSameSuccessEvaluator import MultipleSameSuccessEvaluator
-from parsers.BaseParser import BaseParser
-from parsers.ConceptLexerParser import Sequence, ZeroOrMore, StrMatch, OrderedChoice, Optional, ConceptMatch, \
-    ConceptLexerParser
+from parsers.ConceptLexerParser import Sequence, StrMatch, OrderedChoice, Optional, ConceptMatch
 from sdp.sheerkaDataProvider import SheerkaDataProvider, Event
 
 tests_root = path.abspath("../build/tests")