Python 中的 SymPy | arrange.rank_nonlex()
原文:https://www.geeksforgeeks.orgpy-置换-rank_nonlex-in-python/
arrangement.rank_nonlex():rank_nonlex()是一个 sympy Python 库函数，返回非字典序排列的秩。
语法:sympy.combinations.arranges.arrange.rank_nonlex()
返回:非辞书排列的秩。
代码#1 : rank_nonlex()示例
# Python code explaining
# SymPy.Permutation.rank_nonlex()
# importing SymPy libraries
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation
# Using from
# sympy.combinatorics.permutations.Permutation.rank_nonlex() method
# creating Permutation
a = Permutation([[2, 0], [3, 1]])
b = Permutation([1, 3, 5, 4, 2, 0])
print ("Permutation a - rank_nonlex form : ", a.rank_nonlex())
print ("Permutation b - rank_nonlex form : ", b.rank_nonlex())
输出:
排列 a–秩_非复数形式:13 排列 b–秩_非复数形式:72
代码#2 : rank_nonlex()示例–2D 置换
# Python code explaining
# SymPy.Permutation.rank_nonlex()
# importing SymPy libraries
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation
# Using from sympy.combinatorics.permutations.Permutation.rank_nonlex() method
# creating Permutation
a = Permutation([[2, 4, 0],
[3, 1, 2],
[1, 5, 6]])
print ("Permutation a - rank_nonlex form : ", a.rank_nonlex())
输出:
排列 a–rank_nonlex 形式:218
