[gentoo-portage-dev] [PATCH 09/10] Add digraph.discard

[Sebastian Luther <SebastianLuther@gmx.de>]

---
 pym/portage/util/digraph.py | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/pym/portage/util/digraph.py b/pym/portage/util/digraph.py
index fc1fb86..4a9cb43 100644
--- a/pym/portage/util/digraph.py
+++ b/pym/portage/util/digraph.py
@@ -1,4 +1,4 @@
-# Copyright 2010-2013 Gentoo Foundation
+# Copyright 2010-2014 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 
 from __future__ import unicode_literals
@@ -47,6 +47,16 @@ class digraph(object):
 		priorities.append(priority)
 		priorities.sort()
 
+	def discard(self, node):
+		"""
+		Like remove(), except it doesn't raises KeyError if the
+		node doesn't exist.
+		"""
+		try:
+			self.remove(node)
+		except KeyError:
+			pass
+
 	def remove(self, node):
 		"""Removes the specified node from the digraph, also removing
 		and ties to other nodes in the digraph. Raises KeyError if the
-- 
1.8.3.2