code: def setUpClass(cls):
      cls.model = Darknet(
          fetch(
              "https://raw.githubusercontent.com/pjreddie/darknet/master/cfg/yolov3.cfg"
          ).read_bytes()
      )
      print("Loading weights file (237MB). This might take a while…")
      cls.model.load_weights(
          "https://pjreddie.com/media/files/yolov3.weights"
      )
  
file_path: tinygrad/test/external/external_test_yolo.py
imports: import unittest
  from pathlib import Path
  import cv2
  from examples.yolov3 import Darknet, infer, show_labels
  from tinygrad.helpers import fetch
label_desc: Use image node_id 1 for calling the TestYOLO obj's underlying member method code with example usage: obj.setUpClass(cls) without return types