code: def read(
      self,
      file,
      get_meta=False,
      autojoin_paragraphs=True,
      para_joiner="\n\n",
  ):
      with open(file, "rb") as fh:
          self.fh = fh
          cctx = zstandard.ZstdDecompressor()
          reader = io.BufferedReader(cctx.stream_reader(fh))
          rdr = jsonlines.Reader(reader)
          for ob in rdr:
              # naive jsonl where each object is just the string itself, with no meta. For legacy compatibility.
              if isinstance(ob, str):
                  assert not get_meta
                  yield ob
                  continue
  
              text = ob["text"]
  
              if autojoin_paragraphs and isinstance(text, list):
                  text = para_joiner.join(text)
  
              if get_meta:
                  yield text, (ob["meta"] if "meta" in ob else {})
              else:
                  yield text
  
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 2 for calling the Reader obj's underlying member method code with example usage: obj.read(file, get_meta, autojoin_paragraphs, para_joiner) without return types