[Python] Predicted Image id and box from SSD

How to find predicted image id and Box from SSD, I am using this GitHub link here is the test function which I want to save the image id and box

def test(loader, net, criterion, device):
net.eval()
running_loss = 0.0
running_regression_loss = 0.0
running_classification_loss = 0.0
num = 0
for _, data in enumerate(loader):
images, boxes, labels = data
images = images.to(device)
boxes = boxes.to(device)
labels = labels.to(device)
num += 1

with torch.no_grad():
confidence, locations = net(images)
regression_loss, classification_loss = criterion(confidence, locations, labels, boxes)
loss = regression_loss + classification_loss

running_loss += loss.item()
running_regression_loss += regression_loss.item()
running_classification_loss += classification_loss.item()
return running_loss / num, running_regression_loss / num, run

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