How to Clean NULL items of list of sublists in Python?

[c.poupin]

Hi,
seems to be an issue related to the OUT Dynamo Wrapper
@RubenVivancos see this post

Get Views - Remove nulls in python

the OUT Dynamo Wrapper is capricious with certain objects here a solution import sys import clr import System clr.AddReference('RevitAPI') from Autodesk.Revit.DB import * clr.AddReference('RevitServices') import RevitServices from RevitServices.Persistence import DocumentManager from RevitServices.Transactions import TransactionManager doc = DocumentManager.Instance.CurrentDBDocument uidoc=DocumentManager.Instance.CurrentUIApplication.ActiveUIDocument ueWrapper = next((m for m in clr.GetC…