There are already several different language implementations of the Python runtime, and some of them support WebAssembly. This document will describe how to run RustPython on WasmEdge to execute Python programs.
To compile RustPython, you should have the Rust toolchain installed on your machine. And
wasm32-wasi platform support should be enabled.
$ rustup target add wasm32-wasi
Then you could use the following command to clone and compile RustPython:
$ git clone https://github.com/RustPython/RustPython.git $ cd RustPython $ cargo build --release --target wasm32-wasi --features="freeze-stdlib"
freeze-stdlib feature is enabled for including Python standard library inside the binary file. The output file should be able at
WasmEdge supports compiling WebAssembly bytecode programs into native machine code for better performance. It is highly recommended to compile the RustPython to native machine code before running.
$ wasmedgec ./target/wasm32-wasi/release/rustpython.wasm ./target/wasm32-wasi/release/rustpython.wasm
Since WasmEdge 0.9.0, the universal Wasm binary format has been introduced. So you could use the
.wasm extension for generating cross-runtime compatible format, or use
.so for Linux shared library format.
$ wasmedge ./target/wasm32-wasi/release/rustpython.wasm
Then you could get a Python shell in WebAssembly!
You can pre-open directories to let WASI programs have permission to read and write files stored on the real machine. The following command mounted the current working directory to the WASI virtual file system.
$ wasmedge --dir .:. ./target/wasm32-wasi/release/rustpython.wasm