Filter not Placed Element

import clr

#Import RevitAPI
clr.AddReference("RevitAPI")
import Autodesk
from Autodesk.Revit.DB import *

elements = IN[0]
outlist = []

for element in elements:
    try:
        UnwrapElement(element).Location:
        outlist.append(element)
    except:
        pass

OUT = outlist