'list' object has no attribute 'argsort'

Hi, I am running YOLACT++ on a Jetson Xavier and getting the following error not always, but occasionally. What could be the reason for such an error?

Traceback (most recent call last):
  File "eval.py", line 1103, in <module>
    evaluate(net, dataset)
  File "eval.py", line 890, in evaluate
    evalvideo(net, args.video)
  File "eval.py", line 830, in evalvideo
    frame_buffer.put(frame['value'].get())
  File "/usr/lib/python3.6/multiprocessing/pool.py", line 644, in get
    raise self._value
  File "/usr/lib/python3.6/multiprocessing/pool.py", line 119, in worker
    result = (True, func(*args, **kwds))
  File "eval.py", line 710, in prep_frame
    return prep_display(preds, frame, None, None, undo_transform=False, class_color=True, fps_str=fps_str)
  File "eval.py", line 155, in prep_display
    idx = t[1].argsort(0, descending=True)[:args.top_k]
AttributeError: 'list' object has no attribute 'argsort'

[enhany]

@serhatiscan do not use multithreading. python eval.py --video_multiframe=1 …

[dbolya]

@serhatiscan @enhany’s suggestion should work. I didn’t realize that you were using evalvideo, which uses mulithreading by default. If you want to keep using multithreading (i.e., without setting multiframe to 1) you can just set the global variable to True (by changing 'rescore_bbox': False, in yolact_plus_base_config in data/config.py to 'rescore_bbox': True,). This will break the regular eval mode, but if you’re not computing mAP it should be fine.