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Python dictionaries are insertion-ordered from 3.7+

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Last updated 4 years ago

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They are insertion-ordered in CPython implementation of Python 3.6 as an implementation detail. that it is officially part of the language spec in Python 3.7. From :

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

list(d) on a dictionary returns a list of all the keys used in the dictionary, in insertion order.

Sets are still unordered.

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