code: def main():
      """
      Converts files from the 2009 version of VLSP to .mrg files
  
      Process args, loop through each file in the directory and convert
      to the desired tree format
      """
      parser = argparse.ArgumentParser(
          description="Script that converts a VTB Tree into the desired format",
      )
      parser.add_argument(
          "orig_dir",
          help="The location of the original directory storing original trees ",
      )
      parser.add_argument(
          "new_dir",
          help="The location of new directory storing the new formatted trees",
      )
      args = parser.parse_args()
  
      org_dir = args.org_dir
      new_dir = args.new_dir
  
      convert_dir(org_dir, new_dir)
  
file_path: stanza/stanza/utils/datasets/constituency/vtb_convert.py
imports: import argparse
  import os
  from collections import defaultdict
  from stanza.models.constituency.tree_reader import read_trees, MixedTreeError, UnlabeledTreeError
label_desc: Use image node_id 7 for calling a global function with example usage: main() without return types