code: def on_valid_article_extracted(article):
      
      # do whatever you need to do with the article (e.g., save it to disk, store it in ElasticSearch, etc.)
      with open(__get_pretty_filepath(my_local_download_dir_article, article), 'w') as outfile:
          if my_json_export_style == 0:
              json.dump(article.__dict__, outfile, default=str, separators=(',', ':'))
          elif my_json_export_style == 1:
              json.dump(article.__dict__, outfile, default=str, indent=4, sort_keys=True)
docs: This function will be invoked for each article that was extracted successfully from the archived data and that
      satisfies the filter criteria.
      :param article:
      :return: