Update relative ROOT logic (ultralytics#4955)

* Update relative `ROOT` logic

* python 3.9 Path().is_relative_to() removal

models/tf.py

@@ -20,6 +20,7 @@
 ROOT = FILE.parents[1]  # YOLOv5 root directory
 if str(ROOT) not in sys.path:
     sys.path.append(str(ROOT))  # add ROOT to PATH
+ROOT = ROOT.relative_to(Path.cwd())  # relative
 
 import numpy as np
 import tensorflow as tf

models/yolo.py

@@ -15,11 +15,12 @@
 ROOT = FILE.parents[1]  # YOLOv5 root directory
 if str(ROOT) not in sys.path:
     sys.path.append(str(ROOT))  # add ROOT to PATH
+ROOT = ROOT.relative_to(Path.cwd())  # relative
 
 from models.common import *
 from models.experimental import *
 from utils.autoanchor import check_anchor_order
-from utils.general import check_yaml, make_divisible, set_logging
+from utils.general import check_yaml, make_divisible, print_args, set_logging
 from utils.plots import feature_visualization
 from utils.torch_utils import copy_attr, fuse_conv_and_bn, initialize_weights, model_info, scale_img, \
     select_device, time_sync
@@ -281,6 +282,7 @@ def parse_model(d, ch):  # model_dict, input_channels(3)
     parser.add_argument('--profile', action='store_true', help='profile model speed')
     opt = parser.parse_args()
     opt.cfg = check_yaml(opt.cfg)  # check YAML
+    print_args(FILE.stem, opt)
     set_logging()
     device = select_device(opt.device)