Skip to main content

WebAssembly Interpreter by pure Python

Project description

pywasm: A WebAssembly interpreter written in pure Python.

Build Status

A WebAssembly interpreter written in pure Python.

The wasm version currently in use is: WebAssembly Core Specification, W3C Recommendation, 5 December 2019. Just like Firefox or Chrome does.


$ pip3 install pywasm

Some simple examples

  1. First we need a wasm module! Grab our ./examples/fib.wasm file and save a copy in a new directory on your local machine. Note: fib.wasm was compiled from ./examples/fib.c by WasmFiddle.

  2. Now, compile and instantiate WebAssembly modules directly from underlying sources. This is achieved using the pywasm.load method.

import pywasm
# pywasm.on_debug()

runtime = pywasm.load('./examples/fib.wasm')
r = runtime.exec('fib', [10])
print(r) # 55

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

Of course there are some more complicated examples!


$ python3 ./test/

Tested in the following environments:

  • Python >= 3.6




Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Files for pywasm, version 1.0.7
Filename, size File type Python version Upload date Hashes
Filename, size pywasm-1.0.7.tar.gz (28.9 kB) File type Source Python version None Upload date Hashes View

Supported by

Pingdom Pingdom Monitoring Google Google Object Storage and Download Analytics Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN DigiCert DigiCert EV certificate StatusPage StatusPage Status page