new_contents: from .json2yaml import json2yaml
  from argparse import ArgumentParser
  
  parser = ArgumentParser()
  parser.add_argument('inputfile')
  parser.add_argument('outputfile')
  
  
  def main():
      args = parser.parse_args()
  
      json2yaml(args.inputfile, args.outputfile)
  
  
  if __name__ == '__main__':
      main()
  
subject: Add __main__.py