Write 3dm file

Scripting
7

I Steve
I can not find the method to add more items to the file:

#-*- encoding: UTF-8 -*-
import Rhino
import scriptcontext as sc
import rhinoscriptsyntax as rs


file_3dm=Rhino.FileIO.File3dm() # qui creo l'oggetto file da salvare

print file_3dm
p1=Rhino.Geometry.Point3d(0,0,0) #creo i punti per disegnare la linea
p2=Rhino.Geometry.Point3d(10,10,30)
circle=Rhino.Geometry.Circle(p1,40)
circle2=Rhino.Geometry.Circle(p2,20)
line=Rhino.Geometry.Line(p1,p2)
# there is a method to add more objects?
p=file_3dm.Objects.AddLine(line) #creo la linea i metodi sono quelli di
                            # Rhino.DocObjects.Tables.(Add,Addarc,AddLine ecc.))
                            #oppure in scriptcontext.doc.objects.(Add,AddArc,AddLine ecc.)

a=file_3dm.Write("C:\\BENACCHIO\\as.3dm",5)

Ciao Vittorio