Fixed #68: Implement SheerkaQL

Fixed #70: SheerkaFilterManager : Pipe functions
Fixed #71: SheerkaFilterManager : filter_objects
Fixed #75: SheerkaMemory: Enhance memory() to use the filtering capabilities
Fixed #76: SheerkaEvaluateConcept: Concepts that modify the state of the system must not be evaluated during question

tests/evaluators/test_PythonEvaluator.py

@@ -2,13 +2,14 @@ import ast
 
 import pytest
 
+from core.ast_helpers import NamesWithAttributesVisitor
 from core.builtin_concepts import ReturnValueConcept, ParserResultConcept, BuiltinConcepts
 from core.builtin_helpers import CreateObjectIdentifiers
 from core.concept import Concept
 from core.sheerka.services.SheerkaConceptManager import SheerkaConceptManager
 from core.sheerka.services.SheerkaExecute import ParserInput
 from core.tokenizer import Tokenizer
-from evaluators.PythonEvaluator import PythonEvaluator, PythonEvalError, NamesWithAttributesVisitor
+from evaluators.PythonEvaluator import PythonEvaluator, PythonEvalError
 from parsers.BaseNodeParser import SourceCodeNode, SourceCodeWithConceptNode
 from parsers.FunctionParser import FunctionParser
 from parsers.PythonParser import PythonNode, PythonParser
@@ -386,6 +387,16 @@ class TestPythonEvaluator(TestUsingMemoryBasedSheerka):
         assert evaluated.status
         assert evaluated.value == context.sheerka.get_rule_by_id(str(value)).name
 
+    def test_i_cannot_call_methods_with_side_effect_when_is_question_is_set(self):
+        sheerka, context, foo, bar = self.init_concepts("foo", "bar")
+        context.add_to_protected_hints(BuiltinConcepts.EVAL_QUESTION_REQUESTED)
+
+        parsed = PythonParser().parse(context, ParserInput("set_isa(foo, bar)"))
+        python_evaluator = PythonEvaluator()
+        evaluated = python_evaluator.eval(context, parsed)
+
+        assert sheerka.has_error(context, evaluated, __type="MethodAccessError")
+
     def test_something(self):
         def func(**kwargs):
             for k, v in kwargs.items():