code: def _doc_parms(cls):
      
      axis_descr = "{%s}" % ', '.join("{0} ({1})".format(a, i)
                                      for i, a in enumerate(cls._AXIS_ORDERS))
      name = (cls._constructor_sliced.__name__
              if cls._AXIS_LEN > 1 else 'scalar')
      name2 = cls.__name__
      return axis_descr, name, name2
docs: Return a tuple of the doc parms.