FreeNAS CPU and drive temperatures

#!/usr/bin/env python
#
# FreeNAS CPU and drive temperatures
# based on a shell script by @Bidule0hm

import subprocess

ncpu = int(subprocess.check_output(['sysctl', '-n', 'hw.ncpu']))

for cpu in range(ncpu):
    temperature = subprocess.check_output(
        ['sysctl', '-n', 'dev.cpu.'+str(cpu)+'.temperature']
        )
    print 'CPU {0}: {1}'.format(cpu, temperature),

drives = subprocess.check_output(['sysctl', '-n', 'kern.disks']).split()
drives.sort()

for drive in drives:
    # get SMART data if available
    try:
        smart = subprocess.check_output(['smartctl', '-a', '/dev/'+drive]).splitlines()

        serial = filter(
            lambda line: 'umber' in line,
            smart
            )[0]
        serial = serial.split()[-1]+':'

        temperature = filter(
            lambda line: 'Temperature_Celsius' in line,
            smart
            )[0]
        temperature = temperature.split(None, 9)[9]

    # SMART not supported, or error?
    except subprocess.CalledProcessError as result:
        serial = 'N/A'
        temperature = ''

    print drive, serial, temperature