code: def find_base_path_and_format(main_path, formats):
      
      for fmt in formats:
          try:
              return base_path(main_path, fmt), fmt
          except InconsistentPath:
              continue
  
      raise InconsistentPath(u"Path '{}' matches none of the export formats. "
                             "Please make sure that jupytext.formats covers the current file "
                             "(e.g. add '{}' to the export formats)".format(main_path,
                                                                            os.path.splitext(main_path)[1][1:]))
docs: Return the base path and the format corresponding to the given path