Arduino Yun: Sorting and reading data on Mysql using python

Hello

I went through this forum http://forum.arduino.cc/index.php?topic=214431.0

but i am still struggle to get it right, when i run the python script in the IDE it uploads onto mysql,

but when i try running the script on putty in the arduino yun, i get a NameError: name 'con' is not defined error.

here is my code, thanks in advance.

#!/usr/bin/python

-- coding: utf-8 --

import _mysql
import sys, string, os

try:

con = _mysql.connect(host='127.0.0.1', user='root', passwd='12345*', db='students')

con.query("INSERT INTO maindata (Cellphone, vote) VALUES (9999,0)")

except _mysql.Error, e:

print "Error %d: %s" % (e.args[0], e.args[1])
sys.exit(1)

finally:

if con:
con.close()