[cpburns2009]

That's an implementation detail, and shouldn't be relied upon. If you want an ordered dictionary, you should use collections.OrderedDict.

[westurner]

It's now the spec for 3.6+.

> #python news: @gvanrossum just pronounced that dicts are now guaranteed to retain insertion order. This is the end of a long journey.

https://twitter.com/raymondh/status/941709626545864704

More here: https://www.reddit.com/r/Python/comments/7jyluw/dict_knownor...

OrderedDicts are backwards-compatible and are guaranteed to maintain order after deletion.

[Cyph0n]

True, but if you need both key ordering and performance, dict is the better option.