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Comment by patrickserrano | Hacker News Reader

Oh man, I ran into that when I made my first contribution to our internal Airflow project and was just like wtf is happening.

To be fair it's pretty nice when you get used to it as I doubt you're going to be using bit shifts much.

It's fine. But there are some unintuitive edge cases.

Like, for example, if you have tasks A, B, C, and D you can do...

    A >> (B, C) >> D

but not...

    (B, C) >> A >> D

you have to write...

    D << A << (B, C)