import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *
# Import DocumentManager and TransactionManager
clr.AddReference("RevitServices")
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager
# Import RevitAPI
clr.AddReference("RevitAPI")
import Autodesk
from Autodesk.Revit.DB import *
doc = DocumentManager.Instance.CurrentDBDocument
uiapp = DocumentManager.Instance.CurrentUIApplication
app = uiapp.Application
from System.Collections.Generic import *
# Import ToDSType(bool) extension method
clr.AddReference("RevitNodes")
import Revit
clr.ImportExtensions(Revit.Elements)
filterElement = UnwrapElement(IN[0])
setValue = IN[1]
#categories = List[Autodesk.Revit.DB.ElementId]()
#categories.Add(ElementId(BuiltInCategory.OST_Walls))
parameterCollector = FilteredElementCollector(doc)
# typeof IS NOT RECOGNIZED. WE MUST USE clr.GetClrType()
#parameter = parameterCollector.OfClass(typeof(Autodesk.Revit.DB.Wall)).FirstElement().get_Parameter("Comments")
comment_param = BuiltInParameter.ALL_MODEL_INSTANCE_COMMENTS
parameter = Autodesk.Revit.DB.FilteredElementCollector(DocumentManager.Instance.CurrentDBDocument).OfClass(clr.GetClrType(Wall)).FirstElement().get_Parameter(comment_param)
filterRules = List[Autodesk.Revit.DB.FilterRule]()
filterRules.Add(ParameterFilterRuleFactory.CreateEqualsRule(parameter.Id, setValue, True));
TransactionManager.Instance.EnsureInTransaction(doc)
#filterElement.ClearRules()
filterElement.SetRules(filterRules);
TransactionManager.Instance.TransactionTaskDone()
OUT = categories, parameter