Implemented some enhancement request and fixed some bugs

Fixed #2 : Variables are not recognized when inside a rule token
Fixed #15 : Rule: rete attributes are lost when a new ontology is created
Fixed #14 : ReteNetwork: Format rules must not be added to Rete network
Fixed #16 : DefConcept: Variables are not recognized when they are keyword arguments
Fixed #4 : Comparison are not correctly set when comparison property is a concept
Fixed #14 : Parser: merge FunctionParser.NamesNode and ExpressionParser.NamesNode
Fixed #18 : Parser: Add SourceCodeNode test to UnrecognizedNodeParser
Fixed #20 : At startup Number concept is saved in db a numerous number of time
Fixed #21 : CacheManager: I can remove all elements from a ListIfNeededCache and fill it again
Fixed #22 : CacheManager: I can remove all elements from a SetCache and fill it again
Fixed #23 : HistoryManager: history() no longer works
Fixed #24 : HistoryManager: history() no longer works after creating an exec rule
Fixed #25 : SheerkaMemory: Use MemoryObject instead of sheerka.local
Fixed #26 : Debugger: add the list all available services..
Fixed #27 : CONCEPTS_GRAMMARS_ENTRY does not seems to be in use any more
Fixed #28 : Give order to services

src/sheerkarete/network.py

@@ -5,7 +5,7 @@ from typing import TYPE_CHECKING, Generator, Union
 
 from core.concept import Concept
 from core.global_symbols import NotInit
-from core.rule import Rule
+from core.rule import Rule, ACTION_TYPE_PRINT
 from core.utils import as_bag
 from sheerkarete.alpha import AlphaMemory
 from sheerkarete.beta import ReteNode, BetaMemory
@@ -282,7 +282,9 @@ class ReteNetwork:
         if rule.id is None:
             raise ValueError("Rule has no id, cannot add")
 
-        if not rule.metadata.is_enabled or not rule.metadata.is_compiled:
+        if (not rule.metadata.is_enabled or
+            not rule.metadata.is_compiled or
+            rule.metadata.action_type == ACTION_TYPE_PRINT):
             return
 
         if rule.rete_net: