code: def cursor(self, query, *args, prefetch=None, timeout=None):
          
          self._check_open()
          return cursor.CursorFactory(self, query, None, args,
                                      prefetch, timeout)
docs: Return a *cursor factory* for the specified query.
  
          :param args: Query arguments.
          :param int prefetch: The number of rows the *cursor iterator*
                               will prefetch (defaults to ``50``.)
          :param float timeout: Optional timeout in seconds.
  
          :return: A :class:`~cursor.CursorFactory` object.