Porting DW to target tracking

[dlivxpr]

Hello, I want to port DW to the target tracking algorithm SiamCAR, there is a problem with the shape parameter gt_labels in the loss function, I don't know how to define this, what is his shape. In SiamCAR, gt_labels is just the cls variable as shown in the figure. It is now present in the CenterPrior class, as shown in the image

here is the error and the position when error occur