SymPy | Python中的 Permutation.transpositions()

Permutation.transpositions() : transpositions()是一个 sympy Python库函数，它返回分解成一个转置列表的排列。总是可以将置换表示为转置的乘积。

Syntax : sympy.combinatorics.permutations.Permutation.transpositions()

Return : permutation decomposed into a list of transpositions

代码 #1：transpositions() 示例

# Python code explaining
# SymPy.Permutation.transpositions()
  
# importing SymPy libraries
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation
  
# Using from 
# sympy.combinatorics.permutations.Permutation.transpositions() method 
  
# creating Permutation
a = Permutation([[2, 0], [3, 1]])
  
b = Permutation([1, 3, 5, 4, 2, 0])
  
  
print ("Permutation a - transpositions form : ", a.transpositions())
print ("Permutation b - transpositions form : ", b.transpositions())

输出 ：

Permutation a – transpositions form : [(0, 2), (1, 3)]
Permutation b – transpositions form : [(0, 5), (0, 2), (0, 4), (0, 3), (0, 1)]

代码 #2：transpositions() 示例

# Python code explaining
# SymPy.Permutation.transpositions()
  
# importing SymPy libraries
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation
  
# Using from 
# sympy.combinatorics.permutations.Permutation.transpositions() method 
  
# creating Permutation
a = Permutation([[2, 4, 0], 
                 [3, 1, 2],
                 [1, 5, 6]])
  
  
print ("Permutation a - transpositions form : ", a.transpositions())

输出 ：

Permutation a – transpositions form : [(0, 4), (0, 2), (0, 1), (0, 6), (0, 5), (0, 3)]