Python Sympy Permutation.is_even()用法及代码示例

Permutation.is_even()：is_even()是一个sympy Python库函数，用于检查排列是否为偶数。

用法： sympy.combinatorics.permutations.Permutation.is_even()

返回：true –如果排列是偶数；否则为假

代码1：is_even()示例

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

输出：

Permutation a – is_even form : True
Permutation b – is_even form : False

代码2：is_even()示例– 2D排列

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

输出：

Permutation a – is_even form : True

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注：本文由纯净天空筛选整理自noobestars101大神的英文原创作品 SymPy | Permutation.is_even() in Python。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。