关闭时执行任务的 Cron Python 脚本

Question

I have a python script that runs on my Raspberry Pi on boot automatically using a cron job. It works great. However, In my script I have the following exception or KeyBoard interupt so that if I exit the python script then my LCD data gets cleared

except KeyboardInterrupt:
    display.lcd_clear()

However, if i was to send a reboot command or shutdown command to the Pi then the Pi reboots with the last message still stuck on the LCD meaning that it doesn't execute the keyboard interrupt part of the code. I'm assuming a reboot isn't classified as a Keyboard Interrupt.

Does anyone know how I can make the LCD clear on shutdown and reboot too?

Thanks

Answer 1

Import signal module and use it to capture all termination-related Unix system signals with proper handling. Such as signal.SIGINT and signal.SIGTERM