lockfile.py

import sys
from time import sleep

from lockfile.pidlockfile import PIDLockFile

if __name__ == '__main__':
    # If we can't acquire a lock in 1 second, raise an exception.
    with PIDLockFile('/home/me/script.pid', timeout=1):
        while True:
            sys.stdout.write('Check /home/me/script.pid for my process id\n')
            sleep(1)