try this
import clr
import sys
import RevitServices
from RevitServices.Persistence import DocumentManager
clr.AddReference("RevitAPI")
import Autodesk
from Autodesk.Revit.DB import *
doc = DocumentManager.Instance.CurrentDBDocument
schedview=UnwrapElement(IN[0])
coll=FilteredElementCollector(doc,schedview.Id).WhereElementIsNotElementType().ToElements()
OUT = coll
cordially
christian.stan
