def insert_users(self,tweet):
        #id TEXT, screen_name TEXT, total_tweets INT
        keys = [tweet['user']['id'], tweet['user']['screen_name'],1]
        try:
            cursor = self.con.cursor()
            select = "SELECT id, total_tweets from twitter_users where id="+str(keys[0])
            cursor.execute(select)
            node = cursor.fetchone()
            if node:
                total = node[1]+1
                update = "UPDATE twitter_users set total_tweets = "+str(total)+" where id = "+str(keys[0])
                cursor.execute(update)
            else:
                insert = "INSERT INTO twitter_users(id, screen_name, total_tweets) VALUES (" + str(keys[0]) + ",'" + keys[1] + "', 1)"
                cursor.execute(insert)
        except Exception, e:
            print "DB Error - insert_user: ", e