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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _setup_piddir(self):
 """Create the directory for the PID file if necessary."""

        if self.pidfile is None:
            return
        piddir = os.path.dirname(self.pidfile)
        if not os.path.isdir(piddir):
            # Create the directory with sensible mode and ownership
            os.makedirs(piddir, 0o777 & ~self.umask)
            os.chown(piddir, self.uid, self.gid)