Problem with .stl and Graph

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Hi everyone!

I have a problem with SageMath, and I need your help :).

I want to save my personal Graph from a list to a .stl file (.stl for 3d object representation, "stereolithography").

My code:

p = [[0,0,0],[1,2,3],[2,3,1],[2,1,0],[1,3,2],[3,2,1]]
points = PointConfiguration(p)
triang = points.triangulate()
triang.save('mygraph.stl')
triang.plot(axes=False)

When I try to save my file it's in the .sobj extension. (I research this extension and it's just an extension SageObject, so it's not useful for me). I want to draw a graph with a list of point and to convert them in a .stl file.

I already tried:

• save the plot:

  triang.plot().save('mygraph.stl') # Fails as there is no attribute face_list
  

• save the all[-1]:

  triang.all[-1].save('test.stl') # Fails as PointConfiguration don't have argument all.
  

I don't know what is the problem, so I ask for your help.

Thank you very much.