parse image path from argument

test.py

@@ -1,10 +1,16 @@
+#!/usr/bin/env python3
+
+import sys
+
 from ultralytics import YOLO
 
+image_path = sys.argv[1]
+
 # Load the small pretrained YOLOv8 object-detection model.
 model = YOLO("yolov8n.pt")
 
 # Run object detection on a test image.
-results = model("bus4.jpg")
+results = model(image_path)
 
 has_bus = False
 max_confidence = 0.0