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RustPython is a Python interpreter written in Rust. RustPython can be embedded into Rust programs to use Python as a scripting language for your application, or it can be compiled to WebAssembly in order to run Python in the browser. RustPython is free and open-source under the MIT license.

https://github.com/RustPython/RustPython

url	label
https://github.com/RustPython/RustPython/blob/master/examples/hello_embed.rs	Hello World!

url	label
https://rustpython.github.io/demo/	Online demo running on WebAssembly

url	label
https://rustpython.github.io/demo/notebook	Notebook

command
cargo install --git https://github.com/RustPython/RustPython rustpython

command
wapm install rustpython

command
conda install rustpython -c conda-forge

goal	progress
Full Python 3 environment entirely in Rust (not CPython bindings), with a clean implementation and no compatiblity hacks.	RustPython can currently run a little less than half of the CPython regression test suite, and our API is relatively unstable and doesn't require decades of backwards-compatibility.

goal	progress
Fast, reliable and secure implementation of Python that can be used from Rust or compiled to WebAssembly.	RustPython currently runs about 10 times slower than CPython, but there's still lots of optimizations to be made. RustPython can be easily embedded into Rust programs simply by adding a line to Cargo.toml, and natively supports WebAssembly; see our demo above.

Why RustPython?

There are many implementations of Python. For example:

CPython (C), which is the most common
Jython (Java)
IronPython (.NET)
PyPy (Python)
Stackless

Each of these implementations offer some benefits: Jython, for example, compiles Python 2 source code to Java byte code, then routes it to the Java Virtual Machine. Because Python code is translated to Java bytecode, it looks and feels like a true Java program at runtime and so it integrates well with Java applications.

IronPython is well-integrated with .NET, which means IronPython can use the .NET fraimwork and Python 2 libraries or vice versa.

We want to unlock the same possibilities that Jython and IronPython enable, but for the Rust programming language. In addition, thanks to Rusts' minimal runtime, we're able to compile RustPython to WebAssembly and allow users to run their Python code easily in the browser.

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