python ping thing

py_ping.py

#!/usr/bin/env python
from platform import system as system_name
import subprocess 
import signal
import sys
import time

running = True

def signal_handler(signal, frame):
    global running 
    running = False
    print('You pressed Ctrl+C!')

def ping(host):
    if system_name().lower()=='windows':
        param = "-n 1"
    else:
        param = "-c 1"

    command = "ping %s %s" % (param, host)

    try:
        raw_output = subprocess.check_output(command,shell=True)
        return True
    except subprocess.CalledProcessError as err:
        return False
        
signal.signal(signal.SIGINT, signal_handler)
print('Press Ctrl+C to stop')

while running:
    if ping("8.8.8.8") == False:
        print('\a')
    else:
        print('yay')
    time.sleep(1)