PyO3 recipes

dataframe.py

use pyo3::prelude::*;
use pyo3::types::IntoPyDict;

fn main() -> PyResult<()> {
    Python::with_gil(|py| {
        let locals = [("pd", py.import_bound("pandas")?)].into_py_dict_bound(py);
        let code = "pd.DataFrame({})";
        let res = py.eval_bound(code, None, Some(&locals))?;

        println!("{res:?}");
        Ok(())
    })
}

demo.rs

use pyo3::prelude::*;
use pyo3::types::IntoPyDict;

fn main() -> PyResult<()> {
    Python::with_gil(|py| {
        let sys = py.import_bound("sys")?;
        let version: String = sys.getattr("version")?.extract()?;

        let locals = [("os", py.import_bound("os")?)].into_py_dict_bound(py);
        let code = "os.getenv('USER') or os.getenv('USERNAME') or 'Unknown'";
        let user: String = py.eval_bound(code, None, Some(&locals))?.extract()?;

        println!("Hello {}, I'm Python {}", user, version);
        Ok(())
    })
}

hello_world.rs

use pyo3::prelude::*;

fn main() -> PyResult<()> {
    Python::with_gil(|py| {
        py.eval_bound("print('Hello, world!')", None, None)?;
        Ok(())
    })
}