code: def __getitem__(self, item):
      return {"x": self.x[item], "y": self.y[item]}
  
file_path: fastNLP/tests/helpers/datasets/paddle_data.py
imports: import numpy
  from fastNLP.envs.imports import _NEED_IMPORT_PADDLE
label_desc: Use image node_id 3 for calling the PaddleArgMaxDataset obj's underlying member method code with example usage: obj.__getitem__(item) and returns: dict