def METHOD_NAME(self, gt, s):
    h1 = group.hash((gt, s, 1), ZR)
    h2 = group.hash((gt, s, 2), ZR)
    if(debug):
        print('\nH ...')
        print("gt => '%s'" % gt)
        print("s => '%s'" % s)
        print("h1 => '%s'" % h1)
        print("h2 => '%s'" % h2)
    return (h1, h2)