Raspberry pi Shutdown using interrupt method (unwanted code appears on startup)

I am using the shortcut to turn off the raspberry pi using the interrupt method, and the code for it is:

#Import the modules to send commands to the system and access GPIO pins
from subprocess import call
import RPi.GPIO as gpio

# Define a function to keep script running
def loop():
     raw_input()

# Define a function to run when an interrupt is called
def shutdown(pin):
    call('halt', shell=False)

gpio.setmode(gpio.BOARD) # Set pin numbering to board numbering
gpio.setup(7, gpio.IN) # Set up pin 7 as an input
gpio.add_event_detect(7, gpio.RISING, callback=shutdown, bouncetime=200)
#Set up an interrupt to look for button presses

loop() # Run the loop function to keep script running

      

        
        
        
      

    

Then I set this script to run automatically on boot by adding this line python / home / pi / PiSupply / softshut.py to /etc/rc.local.

Shutdown occurs, but when you turn off this error appears on the screen.

map : vt01=>fb0
oops : terminated

      

        
        
        
      

    

After doing a little search, it turned out that it might be due to fbi. But since this doesn't cause any problems when shutting down, I just wanted this unwanted file to be redirected to the log file and not appear on the screen.

For this I tried:

os.system('pkill fbi') 

os.system('pkill fbi >/dev/null 2>/dev/null')

exec 2> /tmp/rc.local.log 
exec 1>&2

      

        
        
        
      

    

But nothing worked. Can someone please explain what is going on and how to stop spam from appearing on the screen, or perhaps remove the alltogether error.