For hello.ilen implementations see:
For map1.map1:
But implemented for 1 iterable with slightly more efficient PyObject_CallOneArg. Its __next__ is simply:
static PyObject *
map1_next(map1object *lz)
{
PyObject *it = lz->it;
PyObject *item = Py_TYPE(it)->tp_iternext(it);
if (item == NULL) {
return NULL;
}
PyObject *result = PyObject_CallOneArg(lz->func, item);
Py_DECREF(item);
return result;
}
custom.Custom is a simple class with __call__:
static PyObject *
Custom_callvector(CustomObject *self, PyObject *const *args,
size_t nargsf, PyObject *kwnames)
{
if (PyVectorcall_NARGS(nargsf) == 2){
return PyObject_VectorcallDict(self->first, args, nargsf, NULL);
} else {
return PyObject_VectorcallDict(self->last, args, nargsf, NULL);
}
}
I just picked template for it from 2. Defining Extension Types: Tutorial — Python 3.12.3 documentation.
nda is just an array object with same API as numpy. nda.ary == numpy.asarray