SymPy | Python中的 Prufer.next()

Prufer.next() ：next()是一个 sympy Python库函数，它返回比当前序列差 delta 的 Prufer 序列。

Syntax :
sympy.combinatorics.Prufer.prufer.next()

Return :
Prufer sequence that is delta beyond the current one

代码 #1：next() 示例

# Python code explaining
# SymPy.Prufer.next()
  
# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.prufer import Prufer
  
# Using from 
# sympy.combinatorics.prufer.Prufer.next()
  
# Creating Prufer
a = Prufer([1, 2, 3], [2, 4, 5])
  
# next value
print ("Prufer a next : ", a.next(1))

输出 ：

Prufer a next : Prufer([1, 2, 4])

代码 #2：next() 示例

# Python code explaining
# SymPy.Prufer.next()
  
# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.prufer import Prufer
  
# Using from 
# sympy.combinatorics.prufer.Prufer.next()
  
# Creating Prufer
b = Prufer([1, 2, 3, 2, 4, 5], [6, 7], [8])
  
# next value
print ("Prufer b next : ", b.next(1))

输出 ：

Prufer b next : Prufer([1, 2, 3, 2, 4, 6])