# HG changeset patch
# User Sean Farley <sean.michael.farley@gmail.com>
# Date 2014-12-14 23:04:40
# Node ID f08f6a7d4d5fba107a0540138c55d49f85d2d60f
# Parent  75f9643cab1bfd3ee76844f5d1168b08763530d2

namespaces: add a function to turn single results into lists

diff --git a/mercurial/namespaces.py b/mercurial/namespaces.py
--- a/mercurial/namespaces.py
+++ b/mercurial/namespaces.py
@@ -1,5 +1,14 @@
 from mercurial import util
 
+def tolist(val):
+    """
+    a convenience method to return an empty list instead of None
+    """
+    if val is None:
+        return []
+    else:
+        return [val]
+
 class namespaces(object):
     """
     provides an interface to register a generic many-to-many mapping between