new_contents: #!/usr/bin/env python
  """
  Download file from Thingiverse.com
  """
  
  import argparse
  import os.path
  import requests
  
  from thingiverse_crawler import get_download_link
  from download_model import download_single_file
  
  def parse_args():
      parser = argparse.ArgumentParser(__doc__);
      parser.add_argument("--output-dir", help="output directory", default="./");
      parser.add_argument("file_id");
      return parser.parse_args();
  
  def main():
      args = parse_args();
      link = get_download_link(args.file_id);
      __, ext = os.path.splitext(link);
      output_file = "{}{}".format(args.file_id, ext.lower());
      output_file = os.path.join(args.output_dir, output_file);
      download_single_file([output_file, link]);
  
  if __name__ == "__main__":
      main();
  
subject: Add script to download single file from file_id.