Ler dados do Arduino com Python

lerdados.py

#!/usr/bin/env python

import sys
from select import select
arq_saida = open('/tmp/saida-arduino.txt', 'w')
i = 1000
with open("/dev/ttyACM0") as f:
    while i > 0:
        select([f], [], [])
        content = f.read()
        arq_saida.write(content)
	i -= 1

arq_saida.close()