可视化zip和enumer

    print(a_idx)

    print(b_idx)

    print(list(zip(a_idx, b_idx)))

    print(list(enumerate(zip(a_idx, b_idx))))

输出:

[0 2 1]
[0 2 1]
[(0, 0), (2, 2), (1, 1)]
[(0, (0, 0)), (1, (2, 2)), (2, (1, 1))]