code: def __getitem__(self, index):
      item = self.dataset[index]
      if torch.is_tensor(item):
          return torch.numel(item)
      else:
          return np.size(item)
  
file_path: fairseq/fairseq/data/numel_dataset.py
imports: import numpy
  import torch
  from .None import BaseWrapperDataset
label_desc: Use image node_id 2 for calling the NumelDataset obj's underlying member method code with example usage: obj.__getitem__(index) and returns: torch, np