Python | SymPy placement.inversion_vector()
arrangement.inversion_vector():inversion_vector()是一个 sympy Python 库函数，返回参数中排列的 inversion_vector 值。 反转向量包括那些其值指示排列中的元素数量的元素，它们是<它并且位于它的右侧。
语法: sympy.combinations .排列.置换. inversion_vector()
返回: 置换的逆向量值
代码#1 : inversion_vector()示例
# Python code explaining
# SymPy.Permutation.inversion_vector()
# importing SymPy libraries
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation
# Using from sympy.combinatorics.permutations.Permutation.inversion_vector() method
# creating Permutation
a = Permutation([[2, 0], [3, 1]])
b = Permutation([1, 3, 5, 4, 2, 0])
print ("Permutation a - inversion_vector form : ", a.inversion_vector())
print ("Permutation b - inversion_vector form : ", b.inversion_vector())
输出:
排列 a–反转_向量形式:[2，2，0] 排列 b–反转_向量形式:[1，2，3，2，1]
代码#2:反转_向量()示例–2D 置换
# Python code explaining
# SymPy.Permutation.inversion_vector()
# importing SymPy libraries
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation
# Using from sympy.combinatorics.permutations.Permutation.inversion_vector() method
# creating Permutation
a = Permutation([[2, 4, 0],
[3, 1, 2],
[1, 5, 6]])
print ("Permutation a - inversion_vector form : ", a.inversion_vector())
输出:
排列 a–反转向量形式:[3，2，2，2，0，1]
