Export Current Cost power meter readings to a file readable by collectd

cctable.py

#!/usr/bin/python
import os
import serial
import re
s = serial.Serial('/dev/ttyUSB0', 57600)
FILENAME = '/tmp/cctable'
TMPNAME = FILENAME + '.new'
while True:
    data = s.readline().strip()
    rx = re.compile(r'<tmpr>([0-9\.]+)</tmpr>.*<watts>([0-9]+)</watts>')
    bits = rx.findall(data)
    if bits:
        first, = bits
        temp, watts = first
        f = open(TMPNAME, 'w')
        f.write("sensor0\t%s\t%s" % (temp, watts))
        f.close()
        os.rename(TMPNAME, FILENAME)