Munged mn and mnclean into mininet style.

bin/mnclean

@@ -1,7 +1,8 @@
 #!/usr/bin/env python
-"""Mininet Cleanup
 
-@author Bob Lantz (rlantz@cs.stanford.edu)
+"""
+Mininet Cleanup
+author: Bob Lantz (rlantz@cs.stanford.edu)
 
 Unfortunately, Mininet and OpenFlow don't always clean up
 properly after themselves. Until they do (or until cleanup
@@ -15,42 +16,39 @@ from subprocess import Popen, PIPE
 
 from mininet.xterm import cleanUpScreens
 
-
-def sh(cmd):
+def sh( cmd ):
     "Print a command and send it to the shell"
     print cmd
-    return Popen(['/bin/sh', '-c', cmd], stdout=PIPE).communicate()[0]
-
+    return Popen( [ '/bin/sh', '-c', cmd ], stdout=PIPE ).communicate()[ 0 ]
 
 def cleanup():
     """Clean up junk which might be left over from old runs;
        do fast stuff before slow dp and link removal!"""
-
     print "*** Removing excess controllers/ofprotocols/ofdatapaths/pings/noxes"
     zombies = 'controller ofprotocol ofdatapath ping nox_core lt-nox_core '
     zombies += 'udpbwtest'
     # Note: real zombie processes can't actually be killed, since they
-    # are already (un)dead. Then again,
+    # are already ( un )dead. Then again,
     # you can't connect to them either, so they're mostly harmless.
-    sh('killall -9 ' + zombies + ' 2> /dev/null')
+    sh( 'killall -9 ' + zombies + ' 2> /dev/null' )
 
     print "*** Removing junk from /tmp"
-    sh('rm -f /tmp/vconn* /tmp/vlogs* /tmp/*.out /tmp/*.log')
+    sh( 'rm -f /tmp/vconn* /tmp/vlogs* /tmp/*.out /tmp/*.log' )
 
     print "*** Removing old screen sessions"
     cleanUpScreens()
 
     print "*** Removing excess kernel datapaths"
-    dps = sh("ps ax | egrep -o 'dp[0-9]+' | sed 's/dp/nl:/'").split('\n')
+    dps = sh( "ps ax | egrep -o 'dp[0-9]+' | sed 's/dp/nl:/'" ).split( '\n' )
     for dp in dps:
         if dp != '':
-            sh('dpctl deldp ' + dp)
+            sh( 'dpctl deldp ' + dp )
 
     print "*** Removing all links of the pattern foo-ethX"
-    links = sh("ip link show | egrep -o '(\w+-eth\w+)'").split('\n')
+    links = sh( "ip link show | egrep -o '(\w+-eth\w+)'" ).split( '\n' )
     for link in links:
         if link != '':
-            sh("ip link del " + link)
+            sh( "ip link del " + link )
 
     print "*** Cleanup complete."