Chanel load by pf and python

# http://scratch-tales.blogspot.ru/
#!/usr/local/bin/python2.7

import subprocess
import MySQLdb
import datetime

#connect to db and fetch result
tempura_connect = MySQLdb.connect(host='127.0.0.1', port=3310, user='tempdbuser', passwd='tempdbuser', db='tempuradb')
tempura_query = tempura_connect.cursor()

#qresult = tempura_query.fetchall()

pf_out = []

p = subprocess.Popen('pfctl -sI -vv -i xl0', shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)

for line in p.stdout.readlines():
    pf_out.append(line)

iBytes = pf_out[3].find('Bytes')
BytesIn = pf_out[3].replace(']',' ')
BytesIn = BytesIn[iBytes+6:]
BytesIn = BytesIn.strip()

iBytes = pf_out[5].find('Bytes')
BytesOut = pf_out[5].replace(']',' ')
BytesOut = BytesOut[iBytes+6:]
BytesOut = BytesOut.strip()

tempura_query.execute("""INSERT INTO net_storage (measure_time, bytes_in, bytes_out) VALUES (%s, %s, %s)""",(datetime.datetime.now(), BytesIn, BytesOut))
tempura_connect.commit()

retval = p.wait()

tempura_query.close()
tempura_connect.close()