time.sleep()

time.sleep(60)

import pyping
import time
import subprocess
def status(destination):
    return pyping.ping(destination).ret_code
def pinger(destination, timeout1, timeout2):
    while True:
        count = 0
        while status(destination):
            if count >= timeout2:
                subprocess.call(['shutdown.exe', '/s', '/f', '/t', '10'])
            time.sleep(60) # <- так?
            count += 1
    print 'Destination ip {0} is availabel...'.format(destination)
    time.sleep(timeout1*60)
 
if __name__ == '__main__':
    pinger(('192.168.1.1'), 20, 5)

>>>import subprocess
>>>subprocess.call(['shutdown.exe', '/s', '/f', '/t', '10'])

import sys
...
subprocess.call(['shutdown.exe', '/s', '/f', '/t', '10'])
sys.exit()