Use of 3rd party struct in own library, is it possible?

[dmatos2012]

Hello,

I am starting to play around with maturin and I love it so far. However, I ran into an issue trying to have a function accept a struct from 3rd party library, particularly from the geo crate. I found this solution on stackoverflow, but not sure if thats the only way? This is what I have so far:

use geo::geometry::Point;
use pyo3::prelude::*;

#[pyclass]
#[derive(Clone, Copy, Debug)]
pub struct Position {
    pub position: Point<f64>,
}

#[pymethods]
impl Position {
    #[new]
    fn new(position: Point<f64>) -> Self {
        Position { position }
    }
}
#[pyfunction]
fn sum_as_string(a: usize, b: usize, c: Position) -> PyResult<String> {
    println!("{:?}", c);
    Ok((a + b).to_string())
}

/// A Python module implemented in Rust.
#[pymodule]
fn maturinstuff(_py: Python, m: &PyModule) -> PyResult<()> {
    m.add_class::<Position>()?;
    m.add_function(wrap_pyfunction!(sum_as_string, m)?)?;
    Ok(())
}

Then it errors with:

 --> src/lib.rs:15:22
   |
15 |     fn new(position: Point<f64>) -> Self {
   |                      ^^^^^^^^^^ the trait `PyClass` is not implemented for `geo::Point`
   |
   = help: the trait `PyClass` is implemented for `Position`
   = note: required for `geo::Point` to implement `FromPyObject<'_>`
   = note: required for `geo::Point` to implement `PyFunctionArgument<'_, '_>`

I cannot implement since I do not own the struct. Thanks!!!