Awesome
Pywasm: A WebAssembly interpreter written in pure Python.
A WebAssembly interpreter written in pure Python, no third-party libraries are used.
The wasm version currently in use is: WebAssembly Specification, Release 2.0 (Draft 2024-10-29).
Also requires Python version >= 3.12.
Installation
$ pip install pywasm
Some simple examples
-
First we need a wasm module! Grab our
./examples/fib.wasmfile and save a copy in a new directory on your local machine. Note:fib.wasmwas compiled from./examples/fib.c. -
Now, instantiate WebAssembly modules directly from underlying sources. This is achieved using the
Runtime.instance_from_filemethod.
import pywasm
pywasm.log.lvl = 1
runtime = pywasm.core.Runtime()
m = runtime.instance_from_file('./examples/fib.wasm')
r = runtime.invocate(m, 'fib', [10])
print(f'fib(10) = {r[0]}')
A brief description for ./examples
| File | Description |
|---|---|
| ./examples/add.wasm | Export i32.add function |
| ./examples/env.wasm | Call python/native function in wasm |
| ./examples/fib.wasm | Fibonacci, which contains loop and recursion |
| ./examples/str.wasm | Export a function which returns string |
| ./examples/sum.wasm | Equal difference series summation |
Test
$ python ./test/test_spec.py