process/thread instances and attributes

[James Mills]

Hey all,

I have this concept I'm working on and here is
the code... Problem is if you run this it doesn't
terminate. I believe you can terminate it in the
main process by calling a.stop() But I can't find a
way for it to self terminate, ie: self.stop() As indicated
by the code...

----------------------------------------

#!/usr/bin/env python

import os
from time import sleep

from threading import Thread as _Thread
from multiprocessing import Process as _Process

class Process(object):

    def __init__(self, *args, **kwargs):
        super(Process, self).__init__(*args, **kwargs)

        self.running = False
        self.process = _Process(target=self._run)

    def _run(self):
        thread = _Thread(target=self.run)
        thread.start()

        try:
            while self.running and thread.isAlive():
                try:
                    sleep(1)
                    print "!"
                except SystemExit:
                    self.running = False
                    break
                except KeyboardInterrupt:
                    self.running = False
                    break
        finally:
            thread.join()

    def start(self):
        self.running = True
        self.process.start()

    def run(self):
        pass

    def stop(self):
        print "%s: Stopping ..." % self
        self.running = False

class A(Process):

    def run(self):
        while self.running:
            sleep(5)
            self.stop()
a = A()
a.start()

while a.running:
    sleep(1)
    print "."

print "DONE"

----------------------------------------

cheers
James

--
-- "Problems are solved by method"