Mathics Xor

gistfile1.py

class Xor(Builtin):
    """
    >> Xor[True, False]
     = True
    >> Xor[True, True]
     = False
    """

    def apply(self, args, evaluation):
        'Xor[args___]'
        from sympy.logic.boolalg import Xor

        args = [x.to_python() for x in args.get_sequence()]
        if Xor(*args):
            return Symbol('True')
        else:
            return Symbol('False')