Fixed #43 : BnfNodeParser: I can recognize when multiple level of ISA

Fixed #44 : BnfNodeParser: I must simplify results when multiple levels of ISA
Fixed #45 : Dynamic variables cannot be parsed at restart
Fixed #46 : Concepts variables values are transformed into list by default
Fixed #47 : SheerkaAdmin. Add min, max, mean time when restoring files

tests/non_reg/test_sheerka_non_reg_file_based.py

@@ -1,4 +1,5 @@
 from core.builtin_concepts_ids import BuiltinConcepts
+from core.concept import get_concept_attrs, Concept, ALL_ATTRIBUTES
 from core.sheerka.services.SheerkaConceptManager import SheerkaConceptManager
 from parsers.BnfNodeParser import OrderedChoice, StrMatch, Sequence, ConceptExpression, Optional
 from tests.TestUsingFileBasedSheerka import TestUsingFileBasedSheerka
@@ -86,7 +87,7 @@ class TestSheerkaNonRegFile(TestUsingFileBasedSheerka):
             "set_isa(thirties, number)",
         ])
 
-        sheerka = self.get_sheerka()  # another instance
+        sheerka = self.new_sheerka_instance()
 
         assert sheerka.evaluate_user_input("eval twenty one")[0].body == 21
         assert sheerka.evaluate_user_input("eval thirty one")[0].body == 31
@@ -95,10 +96,29 @@ class TestSheerkaNonRegFile(TestUsingFileBasedSheerka):
         sheerka = self.get_sheerka()
         sheerka.evaluate_user_input("push_ontology('test')")
 
-        sheerka = self.new_sheerka_instance(False)
+        sheerka = self.new_sheerka_instance()
 
         res = sheerka.evaluate_user_input("pop_ontology()")
 
         assert len(res) == 1
         assert res[0].status
         assert sheerka.isinstance(res[0].body, BuiltinConcepts.ONTOLOGY_REMOVED)
+
+    def test_i_can_read_concept_with_dynamic_variables_at_restart(self):
+        sheerka = self.init_scenario([
+            "def concept foo",
+            "def concept prop_name",
+            "def concept prop_value",
+            "eval foo",
+            "set_attr(foo, prop_name, prop_value)",
+        ])
+
+        ALL_ATTRIBUTES.clear()
+
+        res = sheerka.evaluate_user_input("in_memory()")
+        res = sheerka.evaluate_user_input("memory(foo)")
+        assert len(res) == 1
+        assert res[0].status
+
+        assert get_concept_attrs(Concept("foo")) == []
+        assert get_concept_attrs(res[0].body) == ['c:prop_name|1002:']