code: def setup_method(self) -> None:
      super().setup_method()
  
      # use SequenceTaggingDatasetReader as the base reader
      self.base_reader = SequenceTaggingDatasetReader(max_instances=4)
      base_file_path = (
          AllenNlpTestCase.FIXTURES_ROOT
          / "data"
          / "sequence_tagging.tsv"
      )
  
      # Make 100 copies of the data
      raw_data = open(base_file_path).read()
      for i in range(100):
          file_path = self.TEST_DIR / f"identical_{i}.tsv"
          with open(file_path, "w") as f:
              f.write(raw_data)
  
      self.identical_files_glob = str(self.TEST_DIR / "identical_*.tsv")
  
      # Also create an archive with all of these files to ensure that we can
      # pass the archive directory.
      current_dir = os.getcwd()
      os.chdir(self.TEST_DIR)
      self.archive_filename = self.TEST_DIR / "all_data.tar.gz"
      with tarfile.open(self.archive_filename, "w:gz") as archive:
          for file_path in glob.glob("identical_*.tsv"):
              archive.add(file_path)
      os.chdir(current_dir)
  
      self.reader = ShardedDatasetReader(base_reader=self.base_reader)
  
file_path: allennlp/tests/data/dataset_readers/sharded_dataset_reader_test.py
imports: import glob
  import os
  import tarfile
  from collections import Counter
  from typing import Tuple
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.data.data_loaders import MultiProcessDataLoader
  from allennlp.data.dataset_readers import SequenceTaggingDatasetReader, ShardedDatasetReader
  from allennlp.data.instance import Instance
label_desc: Use image node_id 1 for calling the TestShardedDatasetReader obj's underlying member method code with example usage: obj.setup_method() without return types