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>To this day I have the nervous tick of initializing arrays with zeros even in numpy.

The typical way to create arrays in Numpy is with `np.zeros(size)`. What is it that you're doing?

Note there's also `np.empty(size)` if you know you're going to initialize all the values in a later step, in which case it can skip assigning zeros to every element.

Or you can create them as outputs from your computations.

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