code: def add_otp_style(self, zip_odp, style_file):
          
          style = zipwrap.Zippier(style_file)
          for picture_file in style.ls("Pictures"):
              zip_odp.write(picture_file, style.cat(picture_file, True))
          xml_data = style.cat("styles.xml", False)
          # import pdb;pdb.set_trace()
          xml_data = self.override_styles(xml_data)
          zip_odp.write("styles.xml", xml_data)
docs: takes the slide content and merges in the style_file