同情| prufer.unrank()用 Python
原文:https://www.geesforgeks.org/sympy-prufer-unlank-in-python/
Prufer.unlank():unlank()是一个 sympy Python 库函数，返回未链接的 Prufer 序列。
语法: 友好。组合者。prro fer.prro fer.un bank()
返回: 解开普鲁弗序列
代码#1:未链接()示例
# Python code explaining
# SymPy.Prufer.unrank()
# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.prufer import Prufer
# Using from
# sympy.combinatorics.prufer.Prufer.unrank()
# Creating Prufer
a = Prufer([1, 2, 3], [2, 4, 5])
# unrank value
# rank = 2
# n = 5
print ("Prufer a unrank : ", a.unrank(2, 5))
输出:
pruder a un bank:125
代码#2:未链接()示例
# Python code explaining
# SymPy.Prufer.unrank()
# importing SymPy libraries
from sympy.combinatorics import Permutation, Cycle
from sympy.combinatorics.prufer import Prufer
# Using from
# sympy.combinatorics.prufer.Prufer.unrank()
# Creating Prufer
b = Prufer([1, 2, 3, 2, 4, 5], [6, 7], [8])
# unrank value
# rank = 2
# n = 5
print ("Prufer b unrank : ", b.unrank(2, 5))
输出:
prfer b unbank:prfer([0，0，2])
