code: def __getitem__(self, idx):
      return self.samples[idx]
  
imports: import tempfile
  from typing import List
  import torch
  import torch.nn
  from captum.influence._core.similarity_influence import cosine_similarity, euclidean_distance, SimilarityInfluence
  from tests.helpers.basic import assertTensorAlmostEqual, BaseTest
  from torch.utils.data import Dataset
label_desc: Use image node_id 3 for calling the RangeDataset obj's underlying member method code with example usage: obj.__getitem__(idx) and returns: self