systematic use of context managers for dealing with files instead of open()/close...

[nepi.git] / examples / openvswitch / ovs_ping_3switches_loop.py

diff --git a/examples/openvswitch/ovs_ping_3switches_loop.py b/examples/openvswitch/ovs_ping_3switches_loop.py
index 3096786..bd246da 100644 (file)
--- a/examples/openvswitch/ovs_ping_3switches_loop.py
+++ b/examples/openvswitch/ovs_ping_3switches_loop.py
@@ -184,36 +184,35 @@ ping11 = ec.trace(app11, 'stdout')
 ping12 = ec.trace(app12, 'stdout')
 
 
-f = open("examples/openvswitch/ovs_ping_3switches_loop.txt", 'w')
-
-if not ping12:
-  ec.shutdown()
-
-f.write("************ Ping From Switch 1 : 192.168.3.2 ********************\n\n")
-f.write(ping1)
-f.write("--------------------------------------\n")
-f.write(ping2)
-f.write("************ Ping From Switch 2 : 192.168.3.4 ********************\n\n")
-f.write(ping3)
-f.write("--------------------------------------\n")
-f.write(ping4)
-f.write("************ Ping From Switch 3 : 192.168.3.6 ********************\n\n")
-f.write(ping5)
-f.write("--------------------------------------\n")
-f.write(ping6)
-f.write("************ Ping From Host 1 : 192.168.3.1 ********************\n\n")
-f.write(ping7)
-f.write("--------------------------------------\n")
-f.write(ping8)
-f.write("************ Ping From Host 2 : 192.168.3.3 ********************\n\n")
-f.write(ping9)
-f.write("--------------------------------------\n")
-f.write(ping10)
-f.write("************ Ping From Host 3 : 192.168.3.5 ********************\n\n")
-f.write(ping11)
-f.write("--------------------------------------\n")
-f.write(ping12)
-f.close()
+with open("examples/openvswitch/ovs_ping_3switches_loop.txt", 'w') as f:
+
+    if not ping12:
+        ec.shutdown()
+
+    f.write("************ Ping From Switch 1 : 192.168.3.2 ********************\n\n")
+    f.write(ping1)
+    f.write("--------------------------------------\n")
+    f.write(ping2)
+    f.write("************ Ping From Switch 2 : 192.168.3.4 ********************\n\n")
+    f.write(ping3)
+    f.write("--------------------------------------\n")
+    f.write(ping4)
+    f.write("************ Ping From Switch 3 : 192.168.3.6 ********************\n\n")
+    f.write(ping5)
+    f.write("--------------------------------------\n")
+    f.write(ping6)
+    f.write("************ Ping From Host 1 : 192.168.3.1 ********************\n\n")
+    f.write(ping7)
+    f.write("--------------------------------------\n")
+    f.write(ping8)
+    f.write("************ Ping From Host 2 : 192.168.3.3 ********************\n\n")
+    f.write(ping9)
+    f.write("--------------------------------------\n")
+    f.write(ping10)
+    f.write("************ Ping From Host 3 : 192.168.3.5 ********************\n\n")
+    f.write(ping11)
+    f.write("--------------------------------------\n")
+    f.write(ping12)
 
 # Delete the overlay network
 ec.shutdown()