code: def __del__(self):
      self.tmp_dir.cleanup()
  
file_path: mmdetection/tests/test_evaluation/test_metrics/test_mot_challenge_metrics.py
imports: import copy
  import os
  import tempfile
  from unittest import TestCase
  import torch
  from mmengine.structures import BaseDataElement, InstanceData
  from mmdet.evaluation import MOTChallengeMetric
  from mmdet.structures import DetDataSample, TrackDataSample
label_desc: Use image node_id 2 for calling the TestMOTChallengeMetric obj's underlying member method code with example usage: obj.__del__() without return types