Example of simple port to HPy for mpl

Example1_mpl.md

// src/_c_internal_utils.c
+ static HPy 
- static PyObject* 
mpl_SetCurrentProcessExplicitAppUserModelID(
+    HPyContext *ctx, 
+    HPy module,
-    PyObject* module,
+    HPy arg
-    PyObject* arg
) {
#ifdef _WIN32
+    wchar_t* appid = HPyUnicode_AsWideCharString(ctx, arg, NULL); 
-    wchar_t* appid = PyUnicode_AsWideCharString(arg, NULL);
    ...
}

// src/qhull_wrap.c
+ static HPy 
- static PyObject*
delaunay(
+    HPyContext *ctx, 
+    HPy h_self,
-    PyObject *self,
+    HPy* args, 
+    HPy_ssize_t nargs
-    PyObject *args
) {
    HPy xarg;
    HPy yarg;
    ...
+    if (!HPyArg_Parse(ctx, NULL, args, nargs, "OO", &xarg, &yarg)) {
-    if (!PyArg_ParseTuple(args, "OO", &xarg, &yarg)) {
+        HPyErr_SetString(ctx, ctx->h_ValueError, "expecting x and y arrays");
-        PyErr_SetString(PyExc_ValueError, "expecting x and y arrays");
+        return HPy_NULL;
-        return NULL;
    }
...
}