ENH: Move away from OrderedDict?

[h-vetinari]

CPython has been guaranteeing insertion order in dictionaries since 3.6, so the use of OrderedDict looks a bit like an anachronism to me. It's also bothersome in the debug prints, because it'll print things in insertion order, rather than with alphabetical keys (so in large dumps it becomes impossible to verify if a given key is absent or present).

Not sure if there are any other reasons to keep it (other than inertia), but IMO this would be a nice cleanup.

[hmaarrfk]

it seems its only used in a few locations.

Generally i find that some libraries do handle it in a special case when they serialize and deserialize into formats external to python.

[baszalmstra]

Personally, I'm not against using OrderedDict because I like that it expresses a requirement on the dictionary instead of that behavior being implicit. This guarantees that it works regardless of which Python version (or interpreter) I use.

[h-vetinari]

This guarantees that it works regardless of which Python version (or interpreter) I use.

It's part of the language spec since 3.7, so every conforming interpreter must implement it.