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

排列.signature()：signature()是一个sympy Python库函数，它返回将排列的元素按规范顺序放置所需的排列签名。
签名=(-1)^

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

返回：排列的签名。

代码1：signature()示例

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

输出：

Permutation a – signature form : 1
Permutation b – signature form : -1

代码2：signature()示例

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

输出：

Permutation a – signature form : 1

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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.signature() 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。