From 74d413161c9e847c8ff8f02737bcb66eb71b742b Mon Sep 17 00:00:00 2001
From: LV-426 <lv-426@taproot.org.il>
Date: Sun, 14 Dec 2014 23:11:33 +0200
Subject: assert ID attr_name not used in Attr_Diff

---
 src-py/model/graph.py | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src-py/model/graph.py')

diff --git a/src-py/model/graph.py b/src-py/model/graph.py
index ebe8b31e..efc403d4 100644
--- a/src-py/model/graph.py
+++ b/src-py/model/graph.py
@@ -46,6 +46,7 @@ class Attr_Diff(dict):
 
     def add_node_attr_write(self, n_id, attr_name, attr_val):
 
+        assert 'id' != attr_name.lower(), 'Attr_Diff: attempt to write to \'id\' attribute'
 
         n_attr_diff = self['__type_node'].get(n_id)
         if None == n_attr_diff:
-- 
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