code: def from_file(filename,
                output_path,
                options=None,
                toc=None,
                cover=None,
                css=None,
                config=None,
                cover_first=None):
      
      rtn = IMGKit(filename,
                   'file',
                   options=options,
                   toc=toc,
                   cover=cover,
                   css=css,
                   config=config,
                   cover_first=cover_first)
      return rtn.to_img(output_path)
docs: Convert HTML file/files to IMG file/files
  
      :param filename: path of HTML file or list with paths or file-like object
      :param output_path: path to output PDF file/files. False means file will be returned as string
      :param options: (optional) dict with wkhtmltopdf global and page options, with or w/o '--'
      :param toc: (optional) dict with toc-specific wkhtmltopdf options, with or w/o '--'
      :param cover: (optional) string with url/filename with a cover html page
      :param css: style of input
      :param config: (optional) instance of imgkit.config.Config()
      :param cover_first: (optional) if True, cover always precedes TOC
      :return: True when success