Update sys.path.append(str(ROOT)) (#4852)

* Update `sys.path.append(str(ROOT))`

* Cleanup

utils/aws/resume.py

@@ -8,7 +8,10 @@ from pathlib import Path
 import torch
 import yaml
 
-sys.path.append('./')  # to run '$ python *.py' files in subdirectories
+FILE = Path(__file__).resolve()
+ROOT = FILE.parents[2]  # YOLOv5 root directory
+if str(ROOT) not in sys.path:
+    sys.path.append(str(ROOT))  # add ROOT to PATH
 
 port = 0  # --master_port
 path = Path('').resolve()