Python 中的 SymPy | arrangement.unrank_trotterjohnson()
原文:https://www.geeksforgeeks.orgpy-置换-unlank_trotterjohnson-in-python/
arrangement.unrank_trotterjohnson():unrank_trotterjohnson()是一个 sympy Python 库函数，返回 trotterjohnson 排列 unranking
语法:sympy.combinations.arranges.arrangement.unrank_trotterjohnson()
返回:特罗特·约翰逊排列解开
代码# 1:unlank_trotterjohnson()示例
# Python code explaining
# SymPy.Permutation.unrank_trotterjohnson()
# importing SymPy libraries
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation
# Using from sympy.combinatorics.permutations.Permutation.unrank_trotterjohnson() method
# creating Permutation
a = Permutation([[2, 0], [3, 1]])
b = Permutation([1, 3, 5, 4, 2, 0])
size = 3
rank = 5
print ("Permutation a - unrank_trotterjohnson form : ", a.unrank_trotterjohnson(size, rank))
print ("Permutation b - unrank_trotterjohnson form : ", b.unrank_trotterjohnson(5, rank))
输出:
排列 a–unrank_trotterjohnson 形式:(2)(0 1) 排列 b–unrank_trotterjohnson 形式:(0 4 2 1)
代码# 2:unlank_trotterjohnson()示例
# Python code explaining
# SymPy.Permutation.unrank_trotterjohnson()
# importing SymPy libraries
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation
# Using from
# sympy.combinatorics.permutations.Permutation.unrank_trotterjohnson() method
# creating Permutation
a = Permutation([[2, 4, 0],
[3, 1, 2],
[1, 5, 6]])
print ("Permutation a - unrank_trotterjohnson form : ", a.unrank_trotterjohnson(4, 8))
输出:
排列 a–unrank_trotterjohnson 形式:(3)(0 2 1)
