Get Symbol.Name

Hi @Kulkul
My code doesnt right

doc = DocumentManager.Instance.CurrentDBDocument
uiapp = DocumentManager.Instance.CurrentUIApplication
app = uiapp.Application

uidoc=DocumentManager.Instance.CurrentUIApplication.ActiveUIDocument

collector = FilteredElementCollector(doc) 
filter = ElementCategoryFilter(BuiltInCategory.OST_GenericAnnotation) 
els=collector.WherePasses(filter).WhereElementIsNotElementType().ToElements() 
symbol=[ Element.Name.GetValue(UnwrapElement(i).Symbol) for i in els] 

i think i must use this topic

but i cant use self