SymPy | Permutation.parity() in Python
Permutation.parity() : parity() is a sympy Python library function that returns the parity of the permutation. It means the parity of the number of inversions in the permutation.
Syntax : sympy.combinatorics.permutations.Permutation.parity()
Return : next permutation in lexicographical parity
Code #1 : parity() Example
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import 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())
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Output :
Permutation a – parity form : 0
Permutation b – parity form : 1
Code #2 : parity() Example – 2D Permutation
from sympy.combinatorics.partitions import Partition
from sympy.combinatorics.permutations import Permutation
a = Permutation([[ 2 , 4 , 0 ],
[ 3 , 1 , 2 ],
[ 1 , 5 , 6 ]])
print ( "Permutation a - parity form : " , a.parity())
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Output :
Permutation a – parity form : 0
Last Updated :
27 Aug, 2019
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