Hi @Claus,
You can do like this in python :
import clr
clr.AddReference('ProtoGeometry')
#from Autodesk.DesignScript.Geometry import *
from Autodesk.DesignScript import Geometry as geom
items = UnwrapElement(IN[0])
points=[]
for item in items:
if isinstance(item, geom.Point):
points.append(item)
OUT = points
Or with the List.RemoveIfNot node :