From ecb394a9780e38a643ad3b0cc61ee3d8978ab28f Mon Sep 17 00:00:00 2001
From: Georg Brandl <georg@python.org>
Date: Tue, 25 May 2010 01:05:36 +0200
Subject: [PATCH] Monkey-patch Node.__contains__ to get consistent behavior for
 docutils 0.5 and 0.6.

---
 sphinx/util/nodes.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/sphinx/util/nodes.py b/sphinx/util/nodes.py
index a4033947a..82427f134 100644
--- a/sphinx/util/nodes.py
+++ b/sphinx/util/nodes.py
@@ -124,3 +124,15 @@ nodes.Node._old_traverse = nodes.Node.traverse
 nodes.Node._all_traverse = _all_traverse
 nodes.Node._fast_traverse = _fast_traverse
 nodes.Node.traverse = _new_traverse
+
+# monkey-patch Node.__contains__ to get consistent "in" operator behavior
+# across docutils versions
+
+def _new_contains(self, key):
+    # support both membership test for children and attributes
+    # (has_key is translated to "in" by 2to3)
+    if isinstance(key, basestring):
+        return key in self.attributes
+    return key in self.children
+
+nodes.Node.__contains__ = _new_contains