When I can write

    import pandas as pd
    data = pd.read_csv(filename)
    print(data.sum())

and have the same result, I'm going to do the one that is faster to write, fewer characters, and lets me understand what's going on.

And don't get me wrong, I've written some gnarly pipelined bash before, although I'm by no means an expert, but that doesn't mean its always the right tool for the job.