Python 中的 SymPy | Prufer.nodes()
原文:https://www.geeksforgeeks.org/sympy-prufer-nodes-in-python/
Prufer.nodes() : nodes() 是一个 sympy Python 库函数，返回树中的节点数。
语法: 友好。组合器. prufer.prufer.nodes()
返回: 树中的节点数
代码#1:节点()示例
# Python code explaining
# SymPy.Prufer.nodes()
# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.prufer import Prufer
# Using from
# sympy.combinatorics.prufer.Prufer.nodes()
# Creating Prufer
a = Prufer([1, 2, 3], [2, 4, 5])
# nodes value
print ("Prufer a nodes : ", a.nodes)
输出:
Prufer a 节点:5
代码#2:节点()示例
# Python code explaining
# SymPy.Prufer.nodes()
# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.prufer import Prufer
# Using from
# sympy.combinatorics.prufer.Prufer.nodes()
# Creating Prufer
b = Prufer([1, 2, 3, 2, 4, 5], [6, 7], [8])
# nodes value
print ("Prufer b nodes : ", b.nodes)
输出:
普鲁士 b 节点:8 个
