new_contents: import click
  import os
  import codecs
  import pandas as pd
  
  from xtas.tasks.single import guess_language
  
  @click.command()
  @click.argument('input_dir', type=click.Path(exists=True))
  @click.argument('output_file', type=click.Path())
  
  def guess(input_dir, output_file):
      output_dir = os.path.dirname(output_file)
      if not os.path.exists(output_dir):
          os.makedirs(output_dir)
  
      data = {}
      data['language'] = []
  
      txt_files = os.listdir(input_dir)
      for txt_file in txt_files:
          with codecs.open(os.path.join(input_dir, txt_file)) as f:
              txt = f.read()
          data['language'].append(guess_language(txt)[0])
  
      df = pd.DataFrame(data=data, index=txt_files)
      df.to_csv(output_file)
  
  if __name__ == '__main__':
      guess()
  
subject: Add script to guess the language of all documents