code: def main():
      args = parse_args()
  
      process(args.in_file, args.out_file, args.merge, args.n_proc)
  
      print("finish")
  
file_path: mmocr/tools/dataset_converters/kie/closeset_to_openset.py
imports: import argparse
  import json
  from functools import partial
  import mmengine
  from mmocr.utils import list_from_file, list_to_file
label_desc: Use image node_id 4 for calling a global function with example usage: main() without return types