Change a parameter of the listed element IDs

[Mostafa_El_Ayoubi]

hi @GHK151112112
for that your custom parameter needs to be multicategory.
Then here’s how you could do it :

in this case the ids are integers

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

doc = DocumentManager.Instance.CurrentDBDocument

ids = [ElementId(i) for i in IN[0]]
elements = [doc.GetElement(id) for id in ids]

OUT = elements