class StreamWatcher:
    def stdout_watcher(self, identifier, stream):
        #for line in stream:
        for line in iter(stream.readline,b''):
            print line
        if not stream.closed:
            stream.close()
        print "-i- Thread Terminating : ", identifier,"\n"

    def stderr_watcher(self, identifier, stream):
        #for line in stream:
        for line in iter(stream.readline,b''):
            print (identifier, line)
        if not stream.closed:
            stream.close()
        print "-i- Thread Terminating : ", identifier, "\n"





class something
    def somefunc
        #did stuff
        proc = subprocess.Popen([PathToCurrentPythonInterpreter, toolPath], stderr=subprocess.PIPE, stdout=subprocess.PIPE, env=env, bufsize=1)

        #create new stdout and stderr stream listener objects
        m=StreamWatcher()
        n=StreamWatcher()

        #create new threads for each listener, when the listener hears something it prints it to the GUI console log area
        Thread(target=m.stdout_watcher, name='stdout-watcher',                args=('STDOUT', proc.stdout)).start()
        Thread(target=n.stderr_watcher, name='stderr-watcher',                args=('STDERR', proc.stderr)).start()