Python | SymPy placement.from_inversion_vector()方法
原文:https://www.geesforgeks.org/python-sympy-置换-from_inversion_vector-method/
replacement.from_inversion_vector():from_inversion_vector()是一个 sympy Python 库函数，返回来自求逆向量的置换。 反转向量–排列中第 I 个元素左侧的元素数量>给出了反转向量的第 I 个元素。
语法: sympy.combinations .排列.置换. from_inversion_vector()
返回: 逆序向量的排列
代码#1 : from_inversion_vector()示例
# Python code explaining
# SymPy.from_inversion_vector()
# importing SymPy libraries
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation
# Using from
# sympy.combinatorics.permutations.Permutation.from_inversion_vector() method
# creating vectors
a = [1, 0, 0, 0]
b = [6, 5, 4, 3, 0, 0 ]
# inversion forms
print ("vector a - from_inversion_vector form : ",
Permutation.from_inversion_vector(a))
print ("vector b - from_inversion_vector form : ",
Permutation.from_inversion_vector(b))
输出:
向量 a–from_inversion_vector 形式:置换([1，0]，大小=5) 向量 b–from_inversion_vector 形式:置换([6，5，4，3，0，1，2])
代码#2 : from_inversion_vector()示例
# Python code explaining
# SymPy.from_inversion_vector()
# importing SymPy libraries
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation
# Using from
# sympy.combinatorics.permutations.Permutation.from_inversion_vector() method
# creating vector
a = [2, 3, 1, 0]
# inverted vector of a
print ("vector a - from_inversion_vector form : ",
Permutation.from_inversion_vector(a))
输出:
向量 a–from_inversion_向量形式:置换([2，4，1，0，3])
