code: def __getitem__(self, i):
      return {"x": self.x[i], "y": self.y[i]}
  
file_path: accelerate/src/accelerate/test_utils/training.py
imports: import numpy
  import torch
  from torch.utils.data import DataLoader
  from accelerate.utils.dataclasses import DistributedType
label_desc: Use image node_id 3 for calling the RegressionDataset obj's underlying member method code with example usage: obj.__getitem__(i) and returns: dict