code: def commit(self):
      self.fh.flush()
      self.fh.close()
  
imports: import os
  import zstandard
  import json
  import jsonlines
  import io
  import datetime
  import mmap
  import tqdm
  from pathlib import Path
label_desc: Use image node_id 3 for calling the TextArchive obj's underlying member method code with example usage: obj.commit() without return types