diff --git a/tools/pylibopenflow/bin/pyopenflow-pythonize.py b/tools/pylibopenflow/bin/pyopenflow-pythonize.py
new file mode 100755
index 0000000..466c35d
--- /dev/null
+++ b/tools/pylibopenflow/bin/pyopenflow-pythonize.py
@@ -0,0 +1,66 @@
+#!/usr/bin/env python2.5
+"""This script generate openflow-packets.py which
+creates Python class for each data structure in openflow.h.
+
+(C) Copyright Stanford University
+Author ykk
+Date December 2009
+"""
+import sys
+sys.path.append('./bin')
+sys.path.append('./pylib')
+import getopt
+import openflow
+import time
+import output
+import of.pythonize
+
+def usage():
+    """Display usage
+    """
+    print "Usage "+sys.argv[0]+" <options> output_file\n"+\
+          "Options:\n"+\
+          "-i/--input\n\tSpecify (non-default) OpenFlow header\n"+\
+          "-t/--template\n\tSpecify (non-default) template file\n"+\
+          "-h/--help\n\tPrint this usage guide\n"+\
+          ""
+          
+#Parse options and arguments
+try:
+    opts, args = getopt.getopt(sys.argv[1:], "hi:t:",
+                               ["help","input","template"])
+except getopt.GetoptError:
+    usage()
+    sys.exit(2)
+
+#Check there is only output file
+if not (len(args) == 1):
+    usage()
+    sys.exit(2)
+
+#Parse options
+##Input
+headerfile=None
+##Template file
+templatefile=None
+for opt,arg in opts:
+    if (opt in ("-h","--help")):
+        usage()
+        sys.exit(0)
+    elif (opt in ("-i","--input")):
+        headerfile=arg
+    elif (opt in ("-t","--template")):
+        templatefile=arg
+    else:
+        print "Unhandled option:"+opt
+        sys.exit(2)
+
+#Generate Python code
+ofmsg = openflow.messages(headerfile)
+pynizer = of.pythonize.pythonizer(ofmsg)
+
+fileRef = open(args[0], "w")
+for x in pynizer.pycode(templatefile):
+    fileRef.write(x+"\n")
+fileRef.write("\n")
+fileRef.close()