code: def __iter__(self) -> Iterator[Tuple[str, ...]]:
      return iter(self.batch_list)
  
file_path: espnet/espnet2/samplers/num_elements_batch_sampler.py
imports: from typing import Iterator, List, Tuple, Union
  import numpy
  from typeguard import check_argument_types
  from espnet2.fileio.read_text import load_num_sequence_text
  from espnet2.samplers.abs_sampler import AbsSampler
label_desc: Use image node_id 4 for calling the NumElementsBatchSampler obj's underlying member method code with example usage: obj.__iter__() and returns: iter