#!/usr/bin/python
# -*- coding: utf-8 -*-

import _mysql
import os

db=_mysql.connect('localhost','...','...','...')

query = "SELECT num,link,id,season,episode FROM list2 ;"
db.query(query)
r=db.store_result()
result = r.fetch_row(maxrows=0, how=0)

for link in result:
    newlink = link[1].replace('http://film.lg.ua/serial/','/mnt/ser/')
    if (os.path.isfile(newlink) == False):
        print "Файл не найден"