Execute shell command after a specified time period. E.g. shutdown computer.

execute_with_delay.py

import os
import datetime
import time
execute_after_minutes = 17
command = 'shutdown /h'
# 'shutdown /s' #shutdown
# 'shutdown /h' #hibernate
def now():
	return datetime.datetime.now()

def is_time(the_time):
    return now()>the_time

shift = datetime.timedelta(minutes = execute_after_minutes)
shutdown_time = datetime.datetime.now()+shift
while True:
    if is_time(shutdown_time):
        os.system(command)
        break
    
    diff = shutdown_time - now()
    hours = diff.seconds / 3600
    mins = (diff.seconds-hours*3600) / 60
    secs = (diff.seconds-hours*3600-mins*60)
    print( 'Left: '+str(hours)+'h '+str(mins)+'m '+str(secs)+'s' )
    time.sleep(5)