Checking if Intenet is working or not

kgp_net_checker.py

import subprocess as sp
import time

def main():
        sleep_dur 		= 5
	test_website 		= 'stw.com'
	cmd_timeout 		= '5'
	cmd_positive_resp 	= 'HREF'

        cmd_str = 'curl %s -m %s -s' % (test_website, cmd_timeout)
	
	flag = 0

        while flag == 0:

                try:
			cmd_out = sp.check_output(cmd_str, shell=True)

			if cmd_out.find(cmd_positive_resp) != -1:
				flag = 1
				print '\n++++++++++++++++++++'
				print 'Net is working!'
				print '++++++++++++++++++++\n'
			else:
				print '\n=================='
				print 'Waiting for net...'
				print '==================\n'

                except:
                        print '\n\nPress Ctrl+c once more...'

                        time.sleep(sleep_dur)

if __name__ == '__main__':
        main()