code: def __getitem__(self, item):
      return {"x": self.x[item], "y": self.y[item]}
  
imports: from functools import reduce
  from numpy import dtype
  from fastNLP.envs.imports import _NEED_IMPORT_TORCH
label_desc: Use image node_id 3 for calling the TorchArgMaxDataset obj's underlying member method code with example usage: obj.__getitem__(item) and returns: dict