Set Built In Parameters

import clr

Import Revit API

clr.AddReference('RevitAPI') from Autodesk.Revit.DB import *

Import ToDSType(bool) extension method

clr.AddReference('RevitNodes') import Revit clr.ImportExtensions(Revit.GeometryConversion) clr.ImportExtensions(Revit.Elements)

Import DocumentManager and TransactionManager

clr.AddReference('RevitServices') import RevitServices from RevitServices.Persistence import DocumentManager from RevitServices.Transactions import TransactionManager

doc = DocumentManager.Instance.CurrentDBDocument

Input

element = UnwrapElement(IN[0]) valueToSet = IN[1]

#Get the type elementType = doc.GetElement(element.GetTypeId())

Get the parameter

parameter = elementType.get_Parameter(BuiltInParameter.UNIFORMAT_CODE)

#Set the parameter in a Transaction TransactionManager.Instance.EnsureInTransaction(doc) parameter.Set(valueToSet) TransactionManager.Instance.TransactionTaskDone()

OUT = 0