code: def gen_pdf(rst_content, style_text, header=None, footer=FOOTER):
      
      out_file_obj = StringIO()
  
      with NamedTemporaryFile() as f:
          f.write(style_text)
          f.flush()
  
          pdf = _init_pdf(f.name, header, footer)
  
      # create PDF
      pdf.createPdf(text=rst_content, output=out_file_obj, compressed=True)
  
      # rewind file pointer to begin
      out_file_obj.seek(0)
  
      return out_file_obj
docs: Create PDF file from `rst_content` using `style_text` as style.
  
      Optinally, add `header` or `footer`.
  
      Args:
          rst_content (str): Content of the PDF file in restructured text markup.
          style_text (str): Style for the :mod:`rst2pdf` module.
          header (str, default None): Header which will be rendered to each page.
          footer (str, default FOOTER): Footer, which will be rendered to each
                 page. See :attr:`FOOTER` for details.
  
      Returns:
          obj: StringIO file instance containing PDF file.