(self, delta=1)
return Prufer.unrank(self.rank + delta, self.nodes)
Generates the Prufer sequence that is delta beyond the current one.

        Examples
        ========

        >>> from sympy.combinatorics.prufer import Prufer
        >>> a = Prufer([[0, 1], [0, 2], [0, 3]])
        >>> b = a.next(1) # == a.next()
        >>> b.tree_repr
        [[0, 2], [0, 1], [1, 3]]
        >>> b.rank
        1

        See Also
        ========

        prufer_rank, rank, prev, size
Generates the Prufer sequence that is delta beyond the current one.
Generates the Prufer sequence that is delta beyond the current one .
def next(self, delta=1):
        """Generates the Prufer sequence that is delta beyond the current one.

        Examples
        ========

        >>> from sympy.combinatorics.prufer import Prufer
        >>> a = Prufer([[0, 1], [0, 2], [0, 3]])
        >>> b = a.next(1) # == a.next()
        >>> b.tree_repr
        [[0, 2], [0, 1], [1, 3]]
        >>> b.rank
        1

        See Also
        ========

        prufer_rank, rank, prev, size

        """
        return Prufer.unrank(self.rank + delta, self.nodes)
def next ( self , delta = 1 ) : return Prufer . unrank ( self . rank + delta , self . nodes )