loc

# http://dronov-architects.ru/
import clr
clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *
# Import ToProtoType, ToRevitType geometry conversion extension methods
clr.AddReference("RevitNodes")
import Revit
clr.ImportExtensions(Revit.GeometryConversion)
#
els = UnwrapElement(IN[0])
lst1, outlist = [], []
for el in els:
    loc = el.Location.Curve.ToProtoType()
    outlist.append(loc)

OUT = outlist