text: import argparse
  import sys
  
  from voussoirkit import gentools
  from voussoirkit import pathclass
  
  def linestofiles(file, lines_per_file):
      file = pathclass.Path(file)
      basename = file.replace_extension('').basename
      basename = basename + '_{index}'
      folder = file.parent
      handle = file.open('r', encoding='utf-8')
      chunks = gentools.chunk_generator(handle, lines_per_file)
      for (index, chunk) in enumerate(chunks):
          chunk = ''.join(chunk)
          chunk_file = folder.with_child(basename.format(index=index)).add_extension(file.extension)
          print(chunk_file)
          chunk_file.open('w', encoding='utf-8').write(chunk)
      handle.close()
  
  def linestofiles_argparse(args):
      return linestofiles(args.file, args.lines_per_file)
  
  def main(argv):
      parser = argparse.ArgumentParser(description=__doc__)
  
      parser.add_argument('file')
      parser.add_argument('lines_per_file', type=int)
      parser.set_defaults(func=linestofiles_argparse)
  
      args = parser.parse_args(argv)
      return args.func(args)
  
  if __name__ == '__main__':
      raise SystemExit(main(sys.argv[1:]))
  