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

src/parsers/PythonParser.py

@@ -6,7 +6,7 @@ import core.utils
 from core.builtin_concepts import BuiltinConcepts
 from core.sheerka.services.SheerkaExecute import ParserInput
 from core.tokenizer import TokenKind
-from parsers.BaseParser import BaseParser, Node, ParsingError, BaseParserInputParser
+from parsers.BaseParser import Node, ParsingError, BaseParserInputParser
 
 log = logging.getLogger(__name__)
 
@@ -24,8 +24,8 @@ class PythonErrorNode(ParsingError):
     source: str
     exception: Exception
 
-    # def __post_init__(self):
-    #     self.log.debug("-> PythonErrorNode: " + str(self.exception))
+    def __hash__(self):
+        return hash((self.source, self.exception))
 
 
 @dataclass()