Python | SymPy 排列. ascents()方法
原文:https://www.geesforgeks.org/python-sympy-置换-ascents-method/
arrangement.ascents():ascents()是一个 sympy Python 库函数，返回置换中 ascents 的位置。 上升是 a[i] < a[i+1]所在的元素
语法:sympy.combinations .排列.置换. ascents()
返回:置换中的上升位置
代码#1:上升()示例
# Python code explaining
# SymPy.ascents()
# importing SymPy libraries
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation
# Using from sympy.combinatorics.permutations.Permutation.ascents() method
# creating Permutation
a = Permutation([[2, 0], [3, 1]])
b = Permutation([1, 3, 5, 4, 2, 0])
print ("Permutation a - ascents form : ", a.ascents())
print ("Permutation b - ascents form : ", b.ascents())
输出:
排列 a–上升形式:[0，2] 排列 b–上升形式:[0，1]
代码#2 : ascents()示例–2D 置换
# Python code explaining
# SymPy.ascents()
# importing SymPy libraries
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation
# Using from sympy.combinatorics.permutations.Permutation.ascents() method
# creating Permutation
a = Permutation([[2, 4, 0],
[3, 1, 2],
[1, 5, 6]])
print ("Permutation a - ascents form : ", a.ascents())
输出:
排列 a–上升形式:[1，2，4]
