use pyo3::prelude::*; #[pyclass] struct MyClass {} #[pymethods] impl MyClass { #[pyo3(name = "__getbuffer__")] fn getbuffer_must_be_unsafe(&self, _view: *mut pyo3::ffi::Py_buffer, _flags: std::os::raw::c_int) {} } #[pymethods] impl MyClass { #[pyo3(name = "__releasebuffer__")] fn releasebuffer_must_be_unsafe(&self, _view: *mut pyo3::ffi::Py_buffer) {} } fn main() {}