# SymPy | Permutation.is_odd() in Python

Permutation.is_odd() : is_odd() is a sympy Python library function that checks whether the permutation is odd.

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

Return : true – if the permutation is odd; otherwise false

Code #1 : is_odd() Example

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

Output :

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

Code #2 : is_odd() Example – 2D Permutation

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

Output :

Permutation a – is_odd form : False

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