Python 中的 SymPy | arrange . is _ even()

原文:https://www . geesforgeks . org/sympy-arrange-is _ even-in-python/

arrange . is _ even():is _ even()是一个 sympy Python 库函数，检查排列是否为偶数。

语法:sympy . combinations . arranges . arrange . 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:

排列 a–is _ 偶数形式:真 排列 b–is _ 偶数形式:假

代码#2 : is_even()示例–2D 置换

# 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:

排列 a–is _ 偶数形式:真

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