Python| SymPy Permutation.cycle_structure() 方法

Permutation.cycle_structure() ：cycle_structure()是一个 sympy Python库函数，它以字典的形式返回排列的循环结构，这将指示每个循环长度的多重性。

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

Return :
cycle structure of the permutation as a dictionary

代码 #1：cycle_structure() 示例

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

输出 ：

Permutation a – cycle_structure form : {2: 1, 4: 1}
Permutation b – cycle_structure form : {1: 3, 3: 1}

代码 #2：cycle_structure() 示例– 2D 排列

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

输出 ：

Permutation a – cycle_structure form : {7: 1}