check_domains.py

import os
import subprocess

domains = open('domains.txt').read().splitlines()

domains_ok = open('domains_ok.txt', 'w')
domains_fail = open('domains_fail.txt', 'w')


for domain in domains:
	p = subprocess.Popen(['ping', domain], stdout=subprocess.PIPE)
	streamdata = p.communicate()[0]
	ret = p.returncode
	#ret = os.system('ping {}'.format(domain))
	if ret == 0:
		domains_ok.write(domain + '\n')
		print domain + ': ok'
	else:
		domains_fail.write(domain + '\n')
		print domain + ': fail'
            
domains_ok.close()
domains_fail.close()