hpy-c-api.c

#include "Python.h"

static PyObject *myabs(PyObject *self, PyObject *arg) {
    return Py_Absolute(arg);
}

static PyMethodDef methods[] = {
    {"myabs", myabs, METH_O, ""},
    {NULL, NULL, 0, NULL}
};

static struct PyModuleDef module = {
    .m_methods = methods
    // ...
};

// -------------------------------------------
// The same with HPy:

#include "hpy.h"

HPyDef_METH(myabs, "myabs", myabs_impl, HPyFunc_O)
static HPy myabs_impl(HPyContext *ctx, HPy self, HPy arg) {
    return HPy_Absolute(ctx, arg);
}

static HPyDef *methods[] = { &myabs, NULL };

static HPyModuleDef module = {
    .defines = methods,
    // ...
};

Used in a medium blog post about HPy