[rspeer]

Ah okay, I didn't know there was now a specific String type (and that the one I was calling 'str' is called 'raw'). Does the Python library use it?

[prutschman]

It can: see https://github.com/msgpack/msgpack-python#string-and-binary-...

[rspeer]

I don't even know what to believe anymore. That documentation is referring to two types, with "raw" renamed to "str" plus a new "bin", which is what I thought it was.

But the link you posted referred to three types, where "str" and "bin" subclass "raw", which sounded like it provided a non-backward-compatible "str" that's guaranteed to be text.