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Isn't it explicitly discouraged to rely on dict() being ordered? IIRC the Python standard (if it exists) has collections.OrderedDict() in mind to fulfill ordering. I think when CPython introduced ordering, they warned about that. [No references included, happy if somebody provides some]

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Yes it was discouraged previously. It became an implementation detail in 3.6 but is wasn't guaranteed. But now it is guaranteed in version 3.7:

> Changed in version 3.7: Dictionary order is guaranteed to be insertion order. This behavior was an implementation detail of CPython from 3.6. [0]

[0] https://docs.python.org/3.7/library/stdtypes.html#typesmappi...

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