medmodels-pyo3-interop

Interoperability layer for passing MedModels types between independent PyO3 extension modules.

Overview

PyO3's #[pyclass] stores type objects in static storage, meaning each compiled extension module gets its own copy. When two separate PyO3 extensions try to share a type like MedRecord, Python sees them as distinct types, breaking compatibility (PyO3#1444).

This crate provides a workaround by serializing MedRecord to bytes (via bincode) when crossing extension boundaries, allowing external Rust-based Python extensions to accept and return MedRecord objects from the main medmodels package.

Key Components

• PyMedRecord - A wrapper around MedRecord implementing PyO3's FromPyObject and IntoPyObject traits via binary serialization
• Type Re-exports - Common Python binding types (PyNodeIndex, PyEdgeIndex, PyGroup, PyAttributes, etc.)

Usage

use medmodels_pyo3_interop::PyMedRecord;
use pyo3::prelude::*;

#[pyfunction]
fn process_medrecord(record: PyMedRecord) -> PyResult<PyMedRecord> {
    // Access the inner MedRecord
    let inner = record.0;

    // Process and return
    Ok(inner.into())
}