Upgrade to Python 3.8 + duplicate check when adding in sdp

tests/test_sheerka.py

@@ -6,7 +6,7 @@ from os import path
 import shutil
 
 from core.concept import Concept, ConceptParts
-from core.sheerka import Sheerka
+from core.sheerka import Sheerka, ExecutionContext
 from parsers.DefaultParser import DefConceptNode, DefaultParser
 from parsers.PythonParser import PythonParser
 
@@ -72,7 +72,7 @@ def test_i_can_add_a_concept():
     concept = get_concept()
     sheerka = Sheerka()
     sheerka.initialize(root_folder)
-    res = sheerka.add_concept(concept)
+    res = sheerka.add_concept(ExecutionContext("xxx"), concept)
     concept_found = res.value
 
     assert res.status
@@ -91,7 +91,7 @@ def test_i_can_add_a_concept():
     assert all_props == ["a", "b"]
 
     assert concept_found.key == "__var__0 + __var__1"
-    assert concept_found.id == "100"
+    assert concept_found.id == "1001"
 
 # def test_i_cannot_add_the_same_concept_twice():
 #     concept1 = DefConceptNode(name="concept")