Function create_py_c_function 

pub unsafe fn create_py_c_function<'py>(
    py: Python<'py>,
    method_def: *mut PyMethodDef,
    module: Option<&Bound<'py, PyModule>>,
) -> PyResult<Bound<'py, PyCFunction>>

Creates a PyCFunction object from a PyMethodDef.

Safety

The method_def pointer must be valid for the lifetime of the returned PyCFunction (effectively, it must be a static variable).