How can I implement a trait for `imgref::Img<std::vec::Vec<i32>>`

I'm trying to use inline-python to get a pic from OpenCV camera, then manipulate this image with Rust, so I wrote the below code that catch the photo correctly, but once I try to handle it in Rust using imgref I get the below error:

error[E0277]: the trait bound `imgref::Img<std::vec::Vec<i32>>: pyo3::pyclass::PyClass` is not satisfied
  --> src\main.rs:44:44
   |
44 |                 let img: Img<Vec<i32>> = c.get("frame");
   |                                            ^^^ the trait `pyo3::pyclass::PyClass` is not implemented for `imgref::Img<std::vec::Vec<i32>>`
   |
   = note: required because of the requirements on the impl of `for<'p> pyo3::conversion::FromPyObject<'p>` for `imgref::Img<std::vec::Vec<i32>>`

The full code is:

#![feature(proc_macro_hygiene)]
use inline_python::*;

use imgref::*;
use web_view::*;

fn main() {
    let c = Context::new();

    web_view::builder()
    .title("Call open CV")
    .content(Content::Html(HTML))
    .size(800, 600)
    .user_data(())
    .invoke_handler(|_, arg| {
        match arg {
            "open" => {
                c.run(python!  {
                            import cv2
                            x = 2
                            cap = cv2.VideoCapture(0)
                            ret, frame = cap.read()
                            cv2.imshow('frame', frame)
                            cv2.waitKey(0)
                    })
            },
            "close" => {

                let img: Img<Vec<i32>> = c.get("frame");

            },
            _ => (),
        }
        Ok(())
    }).run()
    .unwrap();
}

const HTML: &str  = r#"
<!doctype html>
<html>
    <body>
        <button onclick="external.invoke('open')">Run</button>
        <button onclick="external.invoke('close')">Close</button><br>
        <br>

    </body>
</html>
"#;

Can you help, Thanks.

kornelski / imgref

How can I implement a trait for `imgref::Img<std::vec::Vec<i32>>` #13