What would be the simplest way to daemonize a python script in Linux?

from os import fork, setsid, umask, dup2
from sys import stdin, stdout, stderr

if fork(): exit(0)
umask(0)
setsid()
if fork(): exit(0)

stdout.flush()
stderr.flush()
si = file('/dev/null', 'r')
so = file('/dev/null', 'a+')
se = file('/dev/null', 'a+', 0)
dup2(si.fileno(), stdin.fileno())
dup2(so.fileno(), stdout.fileno())
dup2(se.fileno(), stderr.fileno())

from os import getpid
outfile = open(pid_file, 'w')
outfile.write('%i' % getpid())
outfile.close()

from os import setuid, setgid, chdir
from pwd import getpwnam
from grp import getgrnam
setuid(getpwnam('someuser').pw_uid)
setgid(getgrnam('somegroup').gr_gid)
chdir('/')

$ easy_install turkmenbashi
import Turkmenbashi

class DebugDaemon (Turkmenbashi.Daemon):

    def config(self):
        self.debugging = True

    def go(self):
        self.debug('a debug message')
        self.info('an info message')
        self.warn('a warning message')
        self.error('an error message')
        self.critical('a critical message')

if __name__=="__main__":
    d = DebugDaemon()
    d.config()
    d.setenv(30, '/var/run/daemon.pid', '/tmp', None)
    d.start(d.go)

$ easy_install grizzled

>>> from grizzled.os import daemonize
>>> daemon.daemonize()