I’ve become quite interested in Rust lately and have been playing around with it a bit in my free time. My day-to-day work is currently doing some pattern mining in Python with Pandas and Dask. Since some of the tests I’ve done on our datasets are taking in the 1-3 minute range (even on an AKS cluster of several nodes), I thought I’d see how performant I could get Rust. Using PyO3 Rust bindings for Python, I was able to get a blazing fast (~10 seconds) analog - on a single machine.

Learning Rust is and will be a journey for me, being an engineer who typically deals with higher-level languages. So as part of my learning process, I have started putting together some examples of how PyO3 works: the CheeseShop.

A trivial example of the Rust code one might implement:

fn do_something_in_rust(py: Python, value: &PyAny) -> PyResult<()> {
    let strval: Result<&str, PyErr> = value.extract();
    if let Ok(strval) = strval {
        println!("Received string value of \"{}\"", strval);
    } else {
        // Other types of .extract() may be done, too.
        println!("Received some other value: {:?}", value);


This can then be called (after loading your module) in Python:

do_something_in_rust("Hello, Mr. Polly Parrot!");