Is this library any good for using wasm libs in python?

I made a very minimal example:

Rust code compiled to wasm32-wasi

use wasm_bindgen::prelude::*;

#[wasm_bindgen]
pub fn hello()->String{
    String::from("Hello World!")
}

Python code to use it

>>> from wasmtime import loader
>>> import my_test
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.9/site-packages/wasmtime/loader.py", line 71, in exec_module
    imported_module = importlib.import_module(module_name)
  File "/usr/local/lib/python3.9/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
ModuleNotFoundError: No module named '__wbindgen_placeholder__'

Is it possible at all to use this wasmtime-py for calling functions out of a wasi library?

[alexcrichton]

Unfortunately there is not a prototype of interface types as it exists today, but we’re working on getting one off the ground in wasmtime!

[alexcrichton]

This is where the interface between the host and the wasm module itself is very low-level right now, it’s akin to dealing with a C ABI but even a bit harder than that. For a buttery-smooth interface like you want you’ll want to wait for interface types in wasm, since this is the problem they’re trying to solve.