code: def default_flist_reader(
      flist: Union[str, Path]
  ) -> List[Tuple[str, int]]:
      """
      This reader reads a filelist and return a list of paths.
  
      :param flist: path of the flislist to read. The flist format should be:
          impath label, impath label,  ...(same to caffe's filelist)
  
      :returns: Returns a list of paths (the examples to be loaded).
      """
  
      imlist = []
      with open(flist, "r") as rf:
          for line in rf.readlines():
              impath, imlabel = line.strip().split()
              imlist.append((impath, int(imlabel)))
  
      return imlist
  
imports: from pathlib import Path
  from typing import Callable, Generic, List, Tuple, Sequence, Optional, TypeVar, Union
  import torch.utils.data
  from PIL import Image
  import os
  import os.path
  from torch import Tensor
  from torchvision.transforms.functional import crop
  from .transform_groups import XTransform, YTransform
label_desc: Use image node_id 2 for calling a global function with example usage: default_flist_reader(flist) and returns: imlist