Python Ecotect Geco Scripting“无法写入”

Question

import rhinoscriptsyntax as rs
import scriptcontext
import Rhino

if ACTIVE:

    for i in range(len(GEO)):

        scriptcontext.doc = ghdoc

        GEO_id = GEO[i]

        doc_object = rs.coercerhinoobject(GEO_id)

        attributes = doc_object.Attributes
        geometry = doc_object.Geometry

        scriptcontext.doc = Rhino.RhinoDoc.ActiveDoc

        rhino_obj = scriptcontext.doc.Objects.Add(geometry, attributes)

        rs.ObjectColor(rhino_obj, color[i])

        mat_id = rs.AddMaterialToObject(rhino_obj)
        rs.MaterialColor(mat_id, color[i])

  

＆＃34;运行时错误（TypeErrorException）：＆＃39;颜色＆＃39;对象是不可取消的   追溯：     第23行，脚本＆＃34;

我不知道为什么＆＃34; ObjectColor＆＃34;是无法编写的，我已经多次将它与python API相匹配。我没有看到我应该做的事情吗？