From feacaa12ac22666e4bb005cc250cc96f0be53840 Mon Sep 17 00:00:00 2001
From: Paul Sokolovsky <pfalcon@users.sourceforge.net>
Date: Fri, 21 Feb 2014 01:15:20 +0200
Subject: [PATCH] __import__: Catch relative import attempts and throw
 NotImplementedError.

---
 py/builtinimport.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/py/builtinimport.c b/py/builtinimport.c
index 05b8eead57..e64ca82374 100644
--- a/py/builtinimport.c
+++ b/py/builtinimport.c
@@ -140,8 +140,17 @@ mp_obj_t mp_builtin___import__(int n_args, mp_obj_t *args) {
     */
 
     mp_obj_t fromtuple = mp_const_none;
+    int level = 0;
     if (n_args >= 4) {
         fromtuple = args[3];
+        if (n_args >= 5) {
+            level = MP_OBJ_SMALL_INT_VALUE(args[4]);
+        }
+    }
+
+    if (level != 0) {
+        nlr_jump(mp_obj_new_exception_msg(&mp_type_NotImplementedError,
+            "Relative import is not implemented"));
     }
 
     uint mod_len;