As the name implies YapDi is yet another python daemon implementation. Python 2.x standard library didn't have a daemonizing module. It is one of those rare few modules python standard library lacked that put the phrase "batteries included" to shame. There is PEP 3143 which introduces a daemonizing package to python 3.x standard library.
Python community is scattered with so many daemon implementations and this is one of them. This module is a modified version of a code originally posted here. So any compliments should go there first.
python setup.py install
import yapdi
# Creating a yapdi daemon instance
daemon = yapdi.Daemon()
# You can also supply a pid file name at daemon instance creation time
daemon = yapdi.Daemon(pidfile='/var/run/.myservice.pid')
# Daemonizing an instance; Any code placed under this would get executed in daemon mode
daemon.daemonize()
# Stopping a running instance
daemon.kill()
# Restarting an instance; If an instance is already running it would be killed and started again, else would just start
daemon.restart()
# Checking whether an instance is running
if daemon.status():
print('An instance is already running')
else:
print('No instance is running')
# Running a daemonized instance as a different user; any code below these two lines would get executed in daemon mode as user 'user123'
daemon.set_user('user123')
daemon.daemonize()
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