Macro wrap_pyfunction 

macro_rules! wrap_pyfunction {
    ($function:path) => { ... };
    ($function:path, $py_or_module:expr) => { ... };
}

Wraps a Rust function annotated with #[pyfunction].

This can be used with PyModule::add_function to add free functions to a PyModule - see its documentation for more information.

Examples

use pyo3::prelude::*;
#[pyfunction]
fn add(x: i32, y: i32) -> i32 {
    x + y
}

Python::attach(|py| {
    let example = PyModule::from_code(
        py,
        c"from collections.abc import Callable
def add_two_and_three(add: 'Callable[[int, int], int]') -> int:
    return add(2, 3)",
        c"example.py",
        c"",
    )?;

    // `add_two_and_three` is a Python function defined in the code above
    let add_two_and_three = example.getattr("add_two_and_three")?;

    // `add` is a Python function defined by the `#[pyfunction]` macro
    let add = wrap_pyfunction!(add, py)?;

    let result = add_two_and_three.call1((add,))?.extract::<i32>()?;

    assert_eq!(result, 5);

})