Examples using Python-specific data structures?

The `README` (is there more documentation somewhere?) only has a very trivial example of how to use this, and it's not immediately clear how to do anything very complicated. For example, how would I:

1. Create a function that returns a `list`?
2. Define a class in Rust?
3. Write a function that takes arguments?
4. Write a function that manipulates a Python dictionary?

It is possible that these are "out of scope" for this library (which I gather is very low level), but I would find it difficult to write an *interesting* Python extension without doing any of these things. If it is out of scope for this library to document the idiomatic use in writing Python backends, maybe you could have a section linking to a few open source projects actually using milksnake so a new user can try to pick up the idioms?