code: def test_getitem(self):
      for i in range(len(self.dataset)):
          results = self.dataset[i]
          assert isinstance(results, dict)  # no triplet -> dict
          assert "img_path" in results
          assert "gt_label" in results
      for i in range(len(self.dataset_triplet)):
          num = self.num_ids * self.ins_per_id
          results = self.dataset_triplet[i]
          assert isinstance(results, dict)  # triplet -> dict
          assert len(results["img_path"]) == num
          assert "img_path" in results
          assert "gt_label" in results
          for idx in range(num - 1):
              if (idx + 1) % self.ins_per_id != 0:
                  assert (
                      results["gt_label"][idx]
                      == results["gt_label"][idx + 1]
                  )
  
file_path: mmdetection/tests/test_datasets/test_reid_dataset.py
imports: import os.path
  from unittest import TestCase
  from mmdet.datasets import ReIDDataset
label_desc: Use image node_id 4 for calling the TestReIDDataset obj's underlying member method code with example usage: obj.test_getitem() without return types