Python 中的 SymPy | arrange . parity()

原文:https://www . geesforgeks . org/sympy-置换-python 中的奇偶校验/

置换.奇偶() :奇偶()是一个 sympy Python 库函数，返回置换的奇偶。它意味着置换中逆序数的奇偶性。

语法:sympy . combinations .排列.置换.奇偶性()

返回:字典奇偶性中的下一个排列

代码#1:奇偶校验()示例

# Python code explaining
# SymPy.Permutation.parity()

# importing SymPy libraries
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation

# Using from sympy.combinatorics.permutations.Permutation.parity() method 

# creating Permutation
a = Permutation([[2, 0], [3, 1]])

b = Permutation([1, 3, 5, 4, 2, 0])

print ("Permutation a - parity form : ", a.parity())
print ("Permutation b - parity form : ", b.parity())

输出:

排列 a–奇偶形式:0 排列 b–奇偶形式:1

代码#2:奇偶校验()示例–2D 置换

# Python code explaining
# SymPy.Permutation.parity()

# importing SymPy libraries
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation

# Using from sympy.combinatorics.permutations.Permutation.parity() method 

# creating Permutation
a = Permutation([[2, 4, 0], 
                 [3, 1, 2],
                 [1, 5, 6]])

print ("Permutation a - parity form : ", a.parity())

输出:

置换 a–奇偶形式:0

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