def test():
    x = [1,2,3]
    y = 1
    print x[y]
    z = [x, x, x]
    print z[y][y]
    print x[x[y] - y]
    d = {}
    d['z'] = z
    d['x'] = x
    a = 'x'
    print d[a]
    print d[a][y]
    d[a][y] = d

test()