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attrs looks interesting, can it be used in workflows for processing GBs of data? I don't see any Cython compatibility or other Python to compiled code options. I typically just get by with numpy recarrays, but I'm old fashioned and looking for something more modern.

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Attrs would not replace your record array. IIRC you can supply slots so it might be useful for converting raw data into your numpy types, but I suspect you'd find the overhead in function calls problematic

If you want easier than recarray and almost as fast I think you're in pandas-ville

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