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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