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Python 中的 SymPy | Prufer.to_tree()

原文:https://www.geesforgeks.org/sympy-prufer-to_tree-in-python/

Prufer.to_tree():to_tree()是一个 sympy Python 库函数,返回 Prufer 序列的树表示。

语法: 友好。组合者。普鲁士人。普鲁士人。to_tree()

返回: 普鲁弗序列的表示

代码#1 : to_tree()示例

# Python code explaining
# SymPy.Prufer.to_tree()

# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.prufer import Prufer

# Using from 
# sympy.combinatorics.prufer.Prufer.to_tree()

# Creating Prufer
a = Prufer([1, 2, 3], [2, 4, 5], 4)

# to_tree value
print ("Prufer a to_tree : ", Prufer.to_tree([0, 2]))

输出:

Prufer a to_tree : [[0,1],[0,2],[2,3]]

代码#2 : to_tree()示例

# Python code explaining
# SymPy.Prufer.to_tree()

# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.prufer import Prufer

# Using from 
# sympy.combinatorics.prufer.Prufer.to_tree()

# Creating Prufer
b = Prufer([1, 2, 3, 2, 4, 5], [6, 7], [8], 4)

# to_tree value
print ("Prufer b to_tree : ", Prufer.to_tree([0, 2]))

输出:

Prufer b to_tree : [[0,1],[0,2],[2,3]]



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