Merge pull request #2053 from jepler/namedtuple-tuple_get

py: mp_obj_tuple_get: accept any item which can use tuple_getiter

py/objtuple.c

@@ -251,7 +251,8 @@ mp_obj_t mp_obj_new_tuple(size_t n, const mp_obj_t *items) {
 }
 
 void mp_obj_tuple_get(mp_obj_t self_in, size_t *len, mp_obj_t **items) {
-    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_tuple));
+    // type check is done on getiter method to allow tuple, namedtuple, attrtuple
+    mp_check_self(mp_obj_get_type(self_in)->getiter == mp_obj_tuple_getiter);
     mp_obj_tuple_t *self = MP_OBJ_TO_PTR(self_in);
     *len = self->len;
     *items = &self->items[0];