the issue about dataloader ?

[JiaxingChai]

for idx, (img, label) in enumerate(zip(img_li, label_li)): if idx == 0: IMG = torch.zeros(len(img_li), *(img.shape)) LABEL = torch.zeros(len(img_li) - 1, *(label.shape)) IMG[idx, :, :, :] = img else: IMG[idx, :, :, :] = img LABEL[idx - 1, :, :, :] = label

so, why LABEL has less frame than IMG ? i 've been confused about it ?