code: def identity_attributes(cls):
          
          columns = inspect(cls).primary_key
          names = [c.name for c in columns if c.name not in ('width', 'height')]
          return names
docs: A list of the names of primary key fields.
  
          :returns: A list of the names of primary key fields
          :rtype: :class:`typing.Sequence`\ [:class:`str`]
  
          .. versionadded:: 1.0.0