Exit from an if [Python]

I can't exit from this if construct

#!/usr/bin/python2.7
import os
import re
import time
global state


#print status_on.group()
def main():
    get_current_jack_status = """amixer -c1 contents | grep -A 2 'Headphone Jack'"""
    output = os.popen(get_current_jack_status).read()
    status_on = re.search('values=on', output)
    if status_on:
        state = status_on
        os.system("notify-send 'Audio Manager' 'An audio jack was plugged in' -i audacity.png")
        if status_on == state:
            print "True"
            state = 1   #here i can't exit

        if status_on != state:
            print state
            os.system("notify-send 'Audio Manager' 'An audio jack was unplugged' -i audacity.png")


while True:
    main()

I've tried pass but when I execute the script it says as output:

True
1
True
1

ecc. If I use "break" it crashes.

This should work. Move your global declaration to inside the main function, then this should initialize the status, and then check for status changes. This can probably be cleaned up a bit (namely the if statement), but it should work.

#!/usr/bin/python2.7
import os
import sys
import re
import time


#print status_on.group()
def main():
    global state
    get_current_jack_status = """amixer -c1 contents | grep -A 2 'Headphone Jack'"""
    output = os.popen(get_current_jack_status).read()
    status_on = re.search('values=on', output)
    if (status_on is None and state) or (state is None and status_on):
        state = status_on
        if status_on:
            print "a jack was plugged in"
            os.system("notify-send 'Audio Manager' 'An audio jack was plugged in' -i audacity.png")
        else:
            print "a jack was unplugged"
            os.system("notify-send 'Audio Manager' 'An audio jack was unplugged' -i audacity.png")

get_current_jack_status = """amixer -c1 contents | grep -A 2 'Headphone Jack'"""
output = os.popen(get_current_jack_status).read()
state = re.search('values=on', output)

while True:
        main()