what the purpose of those code?

[zhijiejia]

`

    msk[..., 1][msk[..., 2:].max(axis=2)] = False
    msk[..., 3][msk[..., 2]] = False
    msk[..., 4][msk[..., 2]] = False
    msk[..., 4][msk[..., 3]] = False
    msk[..., 0][msk[..., 1:].max(axis=2)] = False

`
I have a question, what does the above code do？ The code is in ‘train50_cls_cce.py’ , about at 235 line. I've been trying to figure out what this means all day...

[mmuneeburahman]

@zhijiejia Did you understand anything??
@vdurnov Can you explain it??