Is there any method to obtain the vertices of an internal loop that intersects with a face

Developers Ruby API
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I can get internal loop1 through method inner_loop = tem_face.loops - [tem_face.outer_loop].
But I can’t imagine any way to obtain loop0 through face.
May I ask if there is any method that can obtain loop0？
Thanks.
model.skp (102.1 KB)

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When you ask a question like this, based upon a certain model, attach the SKP file to the initial post.
(You can edit your post and attach the file.)

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From your image it looks to me that loop0 may be entangled with the “bow-tie” bug in SketchUp. That will make it strange to work with. Share your model and we can check if that’s happened.

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Yeah, you are right. This should be a problem caused by “bow-tie” bug.I just searched for this bug on community. It’s very interesting. Even when I deleted the face composed of loop0, I did not extract this face from the large face.