Element.GetCurves.py

import clr
import math

clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *

clr.AddReference("RevitNodes")
import Revit

clr.ImportExtensions(Revit.GeometryConversion)

items = UnwrapElement(IN[0])
curves = []
for item in items:
    loc = item.Location
    if loc.ToString() == 'Autodesk.Revit.DB.LocationCurve':
        curves.append(loc.Curve.ToProtoType())
    try:
        refs = HostObjectUtils.GetTopFaces(item)
        blines = []
        for ref in refs:
            try:
                boundaries = item.GetGeometryObjectFromReference(ref).GetEdgesAsCurveLoops()
                for loop in boundaries:
                    cloop = []
                    for line in loop:
                        cloop.append(line.ToProtoType())
                    blines.append(cloop)
                
            except:
                pass
        if (len(blines) > 0):
            curves.append(blines)
    except:
        pass
OUT = curves