러스트로 파이썬 패키지 만들기 실습을 해보면 에러가 발생합니다

pipenv shell 환경에서 maturin develop 을 하면 아래와 같이 오류가 뜹니다

(pyo3-9vp6XEz5) D:\D\Work\study\Rust\inflean\easy-rust\pyo3>maturin develop

🔗 Found pyo3 bindings

🐍 Found CPython 3.12 at C:\Users\INNO-A-1328\.virtualenvs\pyo3-9vp6XEz5\Scripts\python.exe

📡 Using build options features from pyproject.toml

Compiling once_cell v1.20.2

Compiling unindent v0.2.3

Compiling cfg-if v1.0.0

Compiling libc v0.2.169

Compiling pyo3-build-config v0.23.3

Compiling memoffset v0.9.1

Compiling pyo3-ffi v0.23.3

Compiling pyo3-macros-backend v0.23.3

Compiling pyo3 v0.23.3

Compiling pyo3-macros v0.23.3

Compiling fibonacci v0.1.0 (D:\D\Work\study\Rust\inflean\easy-rust\pyo3)

error[E0599]: no method named add_function found for reference &pyo3::types::PyModule in the current scope

--> src\lib.rs:17:7

17 | m.add_function(wrap_pyfunction!(run, m)?)?;

| ^^^^^^^^^^^^ method not found in &PyModule

error[E0277]: the trait bound &pyo3::types::PyModule: WrapPyFunctionArg<'_, _> is not satisfied

--> src\lib.rs:17:42

17 | m.add_function(wrap_pyfunction!(run, m)?)?;

| ----------------------^-

| | |

| | the trait WrapPyFunctionArg<'_, _> is not implemented for &pyo3::types::PyModule

| required by a bound introduced by this call

= help: the following other types implement trait WrapPyFunctionArg<'py, T>:

&pyo3::Borrowed<'_, 'py, pyo3::types::PyModule>

&pyo3::Bound<'py, pyo3::types::PyModule>

pyo3::Borrowed<'_, 'py, pyo3::types::PyModule>

pyo3::Bound<'py, pyo3::types::PyModule>

pyo3::Python<'py>

error[E0277]: the trait bound &pyo3::types::PyModule: From<BoundRef<'_, '_, pyo3::types::PyModule>> is not satisfied

--> src\lib.rs:15:1

15 | #[pymodule]

| ^^^^^^^^^^^ the trait From<BoundRef<'_, '_, pyo3::types::PyModule>> is not implemented for &pyo3::types::PyModule, which is required by BoundRef<'_, '_, pyo3::types::PyModule>: Into<_>

= note: required for BoundRef<'_, '_, pyo3::types::PyModule> to implement Into<&pyo3::types::PyModule>

= note: this error originates in the attribute macro pymodule (in Nightly builds, run with -Z macro-backtrace for more info)

Some errors have detailed explanations: E0277, E0599.

For more information about an error, try rustc --explain E0277.

error: could not compile fibonacci (lib) due to 3 previous errors

💥 maturin failed

#[pymodule] 이하 부분을 주석처리하면 아래 에러는 해결되나 python main.py 실행하면 fibonacci 를 찾을 수 없다는 에러가 발생합니다

안녕하세요, pyo3가 버전이 올라가면서 생긴 문제입니다. 먼저 lib.rs는 다음과 같이 수정하세요.

use pyo3::prelude::*;

fn _run(n: u64) -> u64 {
    match n {
        0 => 0,
        1 => 1,
        _ => _run(n - 1) + _run(n - 2),
    }
}

#[pyfunction]
fn run(n: u64) -> PyResult<u64> {
    Ok(_run(n))
}

/// A Python module implemented in Rust.
#[pymodule]
fn fibonacci(_py: Python, m: &Bound<'_, PyModule>) -> PyResult<()> {
    m.add_function(wrap_pyfunction!(run, m)?)?;
    Ok(())
}

그리고 Cargo.toml 은 다음과 같습니다(피처만 추가하셔도 됩니다)

[package]
name = "fibonacci"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[lib]
name = "fibonacci"
crate-type = ["cdylib"]


[dependencies.pyo3]
version = "0.23.3"
features = ["extension-module"]

이제 패키지가 잘 빌드되고 파이썬에서도 함수 호출이 정상적으로 기능합니다.

                     
Python 3.12.6 (main, Sep 15 2024, 11:07:06) [Clang 15.0.0 (clang-1500.3.9.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import fibonacci
>>> fibonacci.run(3)
2
>>> fibonacci.run(3000)

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