how could i get the prototxt file when export yolo-pose model?

[happyamyhope]

❔Question

how could i get the prototxt file when export yolo-pose model?

Additional context

when i use export.py as below,
python models/export.py --weights runs/train/exp/weights/best.pt --img 640 --batch 1 --simplify --export-nms # export at 640x640 with batch size 1
only get the onnx model file and torchscript model file, without prototxt file，and even i add export_prototxt func, there is something error.