Python python-daemon

Install

pip install python-daemon

Documentation

https://www.python.org/dev/peps/pep-3143/	PEP module is tailored to
https://pagure.io/python-daemon/	official homepage

Usage

import daemon
from daemon import pidfile

context = daemon.DaemonContext(
    pidfile=pidfile.PIDLockFile('/var/run/perf-agent.pid')
)