Production wouldn't usually be in Python but if it was, it'd probably be numpy (if it was numerical). It's also fairly heavy (we'd usually exclude MKL for that

Production wouldn't usually be in Python but if it was, it'd probably be numpy (if it was numerical). It's also fairly heavy (we'd usually exclude MKL for that reason), but less 'smart' (fewer defaults, more explicit in most places), so it's a lot safer.