1 files changed, 19 insertions, 1 deletions
diff --git a/py/builtin.c b/py/builtin.c
index 389274f319..39b2da9200 100644
--- a/py/builtin.c
+++ b/py/builtin.c
@@ -324,5 +324,23 @@ static mp_obj_t mp_builtin_sum(int n_args, const mp_obj_t *args) {
     }
     return value;
 }
-
 MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin_sum_obj, 1, 2, mp_builtin_sum);
+
+static mp_obj_t mp_builtin_sorted(mp_obj_t args, mp_map_t *kwargs) {
+    mp_obj_t *args_items = NULL;
+    uint args_len = 0;
+
+    assert(MP_OBJ_IS_TYPE(args, &tuple_type));
+    mp_obj_tuple_get(args, &args_len, &args_items);
+    assert(args_len >= 1);
+    if (args_len > 1) {
+        nlr_jump(mp_obj_new_exception_msg(MP_QSTR_TypeError,
+                                          "must use keyword argument for key function"));
+    }
+    mp_obj_t self = list_type.make_new((mp_obj_t)&list_type, 1, args_items);
+    mp_obj_t new_args = rt_build_tuple(1, &self);
+    list_sort(new_args, kwargs);
+
+    return self;
+}
+MP_DEFINE_CONST_FUN_OBJ_KW(mp_builtin_sorted_obj, 1, mp_builtin_sorted);