使用netron可视化yolov7(torch),但没有线,网上查找相关解决方法但没有解决,想知道是模型那边的问题还是我下方代码的问题

import netron
import torch
from nets.yolo import YoloBody
if __name__ == "__main__":
input_shape = [640, 640]
anchors_mask = [[6, 7, 8], [3, 4, 5], [0, 1, 2]]
num_classes = 80
phi = 'l'
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
m = YoloBody(anchors_mask, num_classes, phi, False, chn=0).to(device)
dummy_input = torch.randn(1, 3, input_shape[0], input_shape[1]).to(device)
out = m(dummy_input)
torch.save(m, "m.pth")
modelData = "m.pth" # 定义模型数据保存的路径
netron.start(modelData) # 输出网络结构