Came to say the same.. insertion order of dict has been here for years for 90+% of Python users (CPython implementation) and a part of the language spec also for almost as many years.

I guess it’s good to spread awareness to HN readers who apparently were unaware, but the headline is very misleading.

90% seems optimistic. I don't think that many Python projects are running the most recent version in production. From personal experience, upgrading to 3.7 was especially a pain because of packages that used "async" for variable/kwarg names.

That’s a very good point, in that case even 50% would probably be optimistic.

We can probably attribute this article’s novelty to the slow adoption of Python 3. In that way it’s probably a good thing that it’s such a popular topic, even if it is old news.

Even further (2016) if you count the fact they were ordered as an implementation detail in CPython 3.6.