code: def main():
      parser = get_parser()
      args = parser.parse_args()
      filter_r = regex.compile(r"[^\p{L}\p{N}\p{M}\' \-]")
  
      lg = args.lang.lower()
      lg_label = f"__label__{lg}"
      thresh = args.lid_threshold
  
      if os.path.exists(args.fasttext_model):
          model = ft.load_model(args.fasttext_model)
      else:
          print(
              f"fasttext language id model {args.fasttext_model} not found. Proceeding without language filtering. "
              f"To enable language filtering, please download the latest language id model "
              f"from https://fasttext.cc/docs/en/language-identification.html",
              file=sys.stderr,
          )
          model = None
  
      for line in sys.stdin:
          line = line.strip()
          line = filter_r.sub(" ", line)
          line = " ".join(line.split())
  
          if model is not None:
              lid, prob = model.predict(line, k=100)
              try:
                  target_idx = lid.index(lg_label)
              except ValueError:
                  continue
              if target_idx == 0 or prob[target_idx] >= thresh:
                  print(line)
          else:
              print(line)
  
imports: import argparse
  import fasttext
  import os
  import regex
  import sys
label_desc: Use image node_id 2 for calling a global function with example usage: main() without return types