code: def get_iterator(args):
      label_path = osp.join(args.data, f"{args.split}.{args.labels}")
      if osp.exists(label_path):
          lp = open(label_path, "r")
      else:
          lp = None
  
      with open(args.data, "r") as fp:
          lines = fp.read().split("\n")
          files = [line.rstrip() for line in lines if len(line) > 0]
  
          if lp is not None:
              lbls = [line.rstrip() for line in lp]
          else:
              lbls = [None] * len(files)
  
          num = len(files)
  
          def iterate():
              for scp_line, lbl in zip(files, lbls):
                  fname, feats_path = scp_line.split()
                  feats = np.load(feats_path)
                  yield feats, fname, lbl
  
          return iterate, num
  
file_path: espnet/egs2/iwslt22_dialect/asr1/pyscripts/feats/feats_apply_cluster_faiss.py
imports: import argparse
  import logging
  import os
  import os.path
  import sys
  import faiss
  import numpy
  import torch
  import torch.nn.functional
  import tqdm
  from feats_cluster_faiss import parse_faiss_specs
label_desc: Use image node_id 2 for calling a global function with example usage: get_iterator(args) and returns: iterate,  num