If you need performance on these kind of structures, you can use structured arrays in python.

The main reason I like the idea of Julia is that I don't see the problem of parallelism being addressed in python, at least not without cumbersome libraries (disclaimer: I haven't tried dask yet). If python had an equivalent to

    #pragma omp parallel for 

I wouldn't have Julia ready in mind for my next project that requires creating a high performance algorithm.