Python 2 to Python 3 error

Annoying, you don’t have to use iselection, unfortunately not as satisfactory… but still does a job…

#credit to the forum for code

import clr
import sys
import System

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

clr.AddReference('RevitAPIUI')
from Autodesk.Revit.UI import *
from Autodesk.Revit.UI.Selection import *

from System.Collections.Generic import List

from RevitServices.Persistence import DocumentManager

doc = DocumentManager.Instance.CurrentDBDocument
uidoc=DocumentManager.Instance.CurrentUIApplication.ActiveUIDocument

pboxS=Autodesk.Revit.UI.Selection.PickBoxStyle.Enclosing

pickedBox = uidoc.Selection.PickObjects(ObjectType.Element, "Select viewports")

for element in pickedBox:
    e_id = element.ElementId
    a=doc.GetElement(e_id)
    #if element category is viewport, do stuff with them....
    #report elements which weren't viewports?

OUT=a
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