Fix calls of the print function

Apparently it seems that in some places of the os-ken we still had
called 'print' funtion in the "python 2 way". This is cached by the
'debug-statements' hook in the pre-commit script so to make it happy
this patch fixes those print calls.

TrivialFix

Change-Id: Iac1f35b6875005b9562ff12511d442f1484d81e5

tools/normalize_json.py

@@ -24,4 +24,4 @@ import sys
 
 j = sys.stdin.read()
 d = json.loads(j)
-print json.dumps(d, ensure_ascii=True, indent=3, sort_keys=True)
+print(json.dumps(d, ensure_ascii=True, indent=3, sort_keys=True))

tools/pyang_plugins/osken.py

@@ -83,15 +83,15 @@ def is_leaf(s):
 
 
 def generate_header(ctx):
-    print _COPYRIGHT_NOTICE
-    print '# do not edit.'
-    print '# this file was mechanically generated with:'
-    print '#    pyang %s' % pyang.__version__
-    print '#    os_ken.tools.pyang_plugins.osken'
+    print(_COPYRIGHT_NOTICE)
+    print('# do not edit.')
+    print('# this file was mechanically generated with:')
+    print('#    pyang %s' % pyang.__version__)
+    print('#    os_ken.tools.pyang_plugins.osken')
     for mod, ver in sorted(ctx.modules):
-        print '#    %s@%s' % (mod, ver)
-    print ''
-    print 'from os_ken.lib.of_config.base import _Base, _e, _ct'
+        print('#    %s@%s' % (mod, ver))
+    print('')
+    print('from os_ken.lib.of_config.base import _Base, _e, _ct')
 
 
 def generate_class_def(s):
@@ -122,8 +122,8 @@ def _generate_class_def(s):
 
 
 def generate_class(s):
-    print ''
-    print ''
+    print('')
+    print('')
     sys.stdout.write(generate_class_def(s))
 
 

tools/topology_graphviz.py

@@ -25,9 +25,9 @@ import sys
 j = sys.stdin.read()
 l = json.loads(j)
 
-print 'digraph {'
-print 'node [shape=box]'
+print('digraph {')
+print('node [shape=box]')
 for d in l:
-    print '"%s" -> "%s";' % (d['src']['dpid'], d['dst']['dpid'])
-print 'overlap=false'
-print '}'
+    print('"%s" -> "%s";' % (d['src']['dpid'], d['dst']['dpid']))
+print('overlap=false')
+print('}')