I understand the motivation to guarantee order, but it's a programmer
convenience that has nothing to do with the idea of mapping, and the
particular (insertion) order is very special and usually neither
relevant nor reproducible. I have no problem whatsoever with just
documenting any failure to preserve order while reproducing dicts,
*except* that a process that inserts keys in the same order had better
result in the same insertion order.json, pickle == png, i.e., guaranteed lossless.repr, pprint == jpg, lossy for very specific motivating reasons.In particular, I use pprint output in regression baselines, and if the long documented sort-by-key behavior changed, I would not be happy.
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