[PYTHON] Safe way to shutdown script (that I compiled into an .exe file)

[Wictorian]

So I have python script that controls brightness based on time, and if it is past 12 I just want to set it to 100% and shut the program down. ( I compiled it into an .exe file) I have a while loop and and if statement that checks the time, and if it is greater than 12, it just breaks the loop, but I think apparently it causes some issues because as soon as the clock hits 12, a message pops up saying 'Failed to execute script ScreenAdjust'. Is there a way I can solve this? I just don't want the box to pop up everytime...

 

The script just in case:
 

Spoiler

import screen_brightness_control as sbc
import datetime
import time
a = str(datetime.datetime.now().time())
hour = (a[0]+a[1])
while(True):
	if (int(hour) => 8 and int(hour) < 12):
        	a = str(datetime.datetime.now().time())
        	hour = a[0]+a[1]        
        	sbc.set_brightness(int(hour)*4)
        	time.sleep(60)
	else:
		sbc.set_brightness(100)
		break

 

 

[Sauron]

You should exit the program cleanly with sys.exit().

import sys

"""whatever"""

sys.exit()

I'm not sure how you "compiled" it though so maybe whatever you used is causing an issue that is independent of this.

[wasab]

i generally do not like while true for alarms, seem like waste of cpu cycle to constantly be checking every millionth of a second. Can't you simply calculate the time for your program to wait and then put it to sleep in the meanwhile? 

[Franck]

12 hours ago, wasab said:

i generally do not like while true for alarms, seem like waste of cpu cycle to constantly be checking every millionth of a second. Can't you simply calculate the time for your program to wait and then put it to sleep in the meanwhile? 

As he said. You want to use a callback trigger at a certain time. Example on windows you are looking for "Windows Scheduler". When you give it a time it will interrupt "around" the time you requested it and your process will gain full CPU cycle again and get it's callback executed. If you do not do that you will pin your CPU to 100% usage on one of it's core (unless you multithread it where it would be all cores)

[Wictorian]

On 4/16/2021 at 2:06 AM, wasab said:

i generally do not like while true for alarms, seem like waste of cpu cycle to constantly be checking every millionth of a second. Can't you simply calculate the time for your program to wait and then put it to sleep in the meanwhile? 

I check it every minute. How can you update the time if you dont use it?

[wasab]

2 hours ago, Wictorian said:

I check it every minute. How can you update the time if you dont use it?

1) find time until 12. Eg. If it is 5:30 atm then that time is 6 hours and 30 minutes. 

 

2) tell program to sleep for that many hours, e.g. 6 hours and 30 minutes. 

 

3) once awoken, turn down/up the brightness. 

 

Use something like sleep(), that way it won't constantly be running in a while loop.