https://colcarroll.github.io/ppl-api/ is likely a good starting point to get a taste of examples in Python; some use custom languages, but the success of Python-native frameworks in the LLM world I think has shown that embracing that makes interop and composability more possible at scale.

https://news.ycombinator.com/item?id=28941145 has some discussion here as well, though it’s a few years old.

Pyro and NumPyro seem to be popular at the moment!