when i run eval_refinedet.py

[jaychou790118]

Traceback (most recent call last): File "eval.py", line 446, in thresh=args.confidence_threshold) File "eval.py", line 420, in test_net evaluate_detections(all_boxes, output_dir, dataset) File "eval.py", line 425, in evaluate_detections do_python_eval(output_dir) File "eval.py", line 178, in do_python_eval ovthresh=0.5, use_07_metric=use_07_metric) File "eval.py", line 295, in voc_eval difficult = np.array([x['difficult'] for x in R]).astype(np.bool) File "eval.py", line 295, in difficult = np.array([x['difficult'] for x in R]).astype(np.bool) KeyError: 'difficult'

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