Update train.py (#10485)

Setting `master_port` to 1 may cause `Permission denied` due to failure to bind the port. So it is better to set it to a port greater than 1024. Signed-off-by: Wang Xin <xinwang614@gmail.com> Signed-off-by: Wang Xin <xinwang614@gmail.com> Co-authored-by: Ayush Chaurasia <ayush.chaurarsia@gmail.com>

Update train.py (#10485)
43623729 · Wang Xin · GitHub · b2f94e8c · 43623729
--- a/classify/train.py
+++ b/classify/train.py
@@ -6,7 +6,7 @@ Usage - Single-GPU training:
    $ python classify/train.py --model yolov5s-cls.pt --data imagenette160 --epochs 5 --img 224

 Usage - Multi-GPU DDP training:
-    $ python -m torch.distributed.run --nproc_per_node 4 --master_port 1 classify/train.py --model yolov5s-cls.pt --data imagenet --epochs 5 --img 224 --device 0,1,2,3
+    $ python -m torch.distributed.run --nproc_per_node 4 --master_port 2022 classify/train.py --model yolov5s-cls.pt --data imagenet --epochs 5 --img 224 --device 0,1,2,3

 Datasets:           --data mnist, fashion-mnist, cifar10, cifar100, imagenette, imagewoof, imagenet, or 'path/to/data'
 YOLOv5-cls models:  --model yolov5n-cls.pt, yolov5s-cls.pt, yolov5m-cls.pt, yolov5l-cls.pt, yolov5x-cls.pt