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All four of these are positive points for the projects I manage

- 3 is nicer language to work in, transitions have been smooth

- I like different package managers for different purposes (pip for source or pure Python, conda for heavy precompiled binary packages, apt/yum for system packages)

- shallow copy makes memory management easier by default

- no built in stats structure: if there was, it would be the hammer looking for nails everywhere. Ever worked in MATLAB? Everything is a goddamn matrix (not true anymore but still).

A testament to the language and its extension APIs is that NumPy and Torch Tensors are very comfortable to work with yet aren’t built in data structures.

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