From 50dd7b58b2e06e2c136ab7e5358dcd5669c3e413 Mon Sep 17 00:00:00 2001
From: Tom Henderson <tomh@tomh.org>
Date: Sun, 26 Aug 2012 23:55:21 -0700
Subject: [PATCH] robustly import ns.visualizer in example

---
 src/flow-monitor/examples/wifi-olsr-flowmon.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/flow-monitor/examples/wifi-olsr-flowmon.py b/src/flow-monitor/examples/wifi-olsr-flowmon.py
index e66b788f7..b2a94e298 100644
--- a/src/flow-monitor/examples/wifi-olsr-flowmon.py
+++ b/src/flow-monitor/examples/wifi-olsr-flowmon.py
@@ -26,7 +26,10 @@ import ns.mobility
 import ns.network
 import ns.olsr
 import ns.wifi
-import ns.visualizer
+try:
+    import ns.visualizer
+except ImportError:
+    pass
 
 DISTANCE = 100 # (m)
 NUM_NODES_SIDE = 3