Error returning results in main.evaluate2

[xjc6666]

The parameter val_loader2 passed in when using
acc, loss_val, precision, recall, auc, sp = evaluate2(val_loader2, net, epoch=epoch_up) in line 271 has a batch_size of 1. Therefore, in line 245, since p has only 1 dimension, it cannot calculate precision_.compute()[1].item(), recall_.compute()[1].item() and reports an error