How could I ask Thread B to call B().Method() from inside Thread A's run?

[Jeremy Jones]

could ildg wrote:

> I have 2 thead instances,
> A and B,
> In A's run method, if I call B.Method(), it will be executed in thead A,
> but I want B.Method() to be executed in B's thread.
> That's to say, I want to tell Thead B to do B's stuff in B's thread,
> kinda like PostMessage in win32.
> Can I do it in python?
> How?
> Thank you in advance.

Here is a really simple, stupid example of what I think you're trying to 
do.  You probably want to use a Queue between your threads.

##########################
#!/usr/bin/python


import threading
import Queue


class A(threading.Thread):
    def __init__(self, q):
        self.q = q
        threading.Thread.__init__(self)
    def run(self):
        for i in range(10):
            print "Thread A putting \"something\" onto the queue"
            self.q.put("something")
        self.q.put("stop")

class B(threading.Thread):
    def __init__(self, q):
        self.q = q
        self.proceed = True
        threading.Thread.__init__(self)
    def do_something(self):
        print "Thread B doing something"
    def do_stop(self):
        print "Thread B should stop soon"
        self.proceed = False
    def run(self):
        while self.proceed:
            print "Thread B pulling sommething off of the queue"
            item = q.get()
            print "Thread B got %s" % item
            getattr(self, "do_" + str(item))()

if __name__ == "__main__":
    q = Queue.Queue()
    a = A(q)
    a.start()
    b = B(q)
    b.start()
    a.join()
    b.join()
##############################

HTH,

- jmj