  1. pyo3::marker - Rust, accessed on July 14, 2025,
     <https://pyo3.rs/main/doc/pyo3/marker/>

  1. Supporting Free-Threaded Python - PyO3 user guide, accessed on July 14,
     2025, <https://pyo3.rs/main/free-threading>

  1. pyo3 - Rust - [Docs.rs](http://Docs.rs), accessed on July 14, 2025,
     <https://docs.rs/pyo3/0.25.1/pyo3/>

  1. pyo3 - Rust - [Docs.rs](http://Docs.rs), accessed on July 14, 2025,
     <https://docs.rs/pyo3/latest/pyo3/>
