(self)
return bool(self.parity() % 2)
Checks if a permutation is odd.

        Examples
        ========

        >>> from sympy.combinatorics.permutations import Permutation
        >>> p = Permutation([0,1,2,3])
        >>> p.is_odd
        False
        >>> p = Permutation([3,2,0,1])
        >>> p.is_odd
        True

        See Also
        ========

        is_even
Checks if a permutation is odd.
Checks if a permutation is odd .
def is_odd(self):
        """
        Checks if a permutation is odd.

        Examples
        ========

        >>> from sympy.combinatorics.permutations import Permutation
        >>> p = Permutation([0,1,2,3])
        >>> p.is_odd
        False
        >>> p = Permutation([3,2,0,1])
        >>> p.is_odd
        True

        See Also
        ========

        is_even
        """
        return bool(self.parity() % 2)
def is_odd ( self ) : return bool ( self . parity ( ) % 2 )