From 85f494db155d13edf3e7f98e833482763f3a8798 Mon Sep 17 00:00:00 2001
From: lenacom <lenacom>
Date: Tue, 1 Mar 2016 13:02:57 +0300
Subject: [PATCH] fixed comment

---
 openedx/core/lib/block_structure/block_structure.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/openedx/core/lib/block_structure/block_structure.py b/openedx/core/lib/block_structure/block_structure.py
index cd2422285f..c0a40b46da 100644
--- a/openedx/core/lib/block_structure/block_structure.py
+++ b/openedx/core/lib/block_structure/block_structure.py
@@ -66,9 +66,9 @@ class BlockStructure(object):
 
     def __iter__(self):
         """
-        The default iterator for a block structure is a topological
-        traversal since it's the more common case and we currently
-        need to support DAGs.
+        The default iterator for a block structure is get_block_keys()
+        since we need to filter blocks as a list.
+        A topological traversal can be used to support DAGs.
         """
         return self.get_block_keys()