Since when builtin dict preserve key order?

[Chris Angelico]

On Sat, Mar 24, 2018 at 3:34 PM, Arkadiusz Bulski <arek.bulski at gmail.com> wrote:
> I already asked on PYPY and they confirmed that any version of pypy,
> including 2.7, has dict preserving insertion order. I am familiar with
> ordered **kw which was introduced in 3.6 but I also heard that builtin dict
> preserves order since 3.5. Is that true?
>

I don't think 3.5 had it. According to the tracker, it landed in 3.6:

https://bugs.python.org/issue27350

But yes, current versions of CPython preserve insertion order.

ChrisA