General output parser

parser.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import multiprocessing, subprocess, sys

class Parser(multiprocessing.Process):
    process = None

    def __init__(self, daemon, output):
        super(Parser, self).__init__()
        self.daemon = daemon
        self.output = output

    def start(self):
        if self.daemon:
            self.launchFoobar() # Foobar is launched before forking
        super(Parser, self).start()
        
    def run(self):
        if not self.daemon:
            self.launchFoobar() # Foobar is launched after forking
        self.parseFoobar()
    
    def launchFoobar(self):
        self.process = subprocess.Popen(["python", "foobar.py"], stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)

    def parseFoobar(self):
        with open(self.output, "w+") as f:
            for line in iter(self.process.stdout):
                f.write(line)
                f.flush()
        self.process.wait()
        
if __name__ == "__main__":
    async = Parser(True, "async.txt")
    async.start()
    sync = Parser(False, "sync.txt")
    sync.start()