try/finally in threads

[Diez B. Roggisch]

George Sakkis wrote:

> I posted this on the Pyro list but I'm not sure if it's related
> specifically to Pyro. The "finally" clause below is not executed when
> f() runs on on a (daemon) thread and the program exits. DAEMON here is
> a global Pyro.code.Daemon instance.
> 
> def f():
>    try: DAEMON.requestLoop()
>    finally:
>        # nothing is printed if f() runs in a thread
>        print "i am here!!"
>        DAEMON.shutdown()
>        print "i am over!!"
> 
> Is "finally" not guaranteed to be executed in a non-main thread or is
> there something else going on ?

Well, that's pretty much the idea behind daemon threads - that they are
terminated immediately. If it were otherwise, a little endless-loop in that
finally-statement of yours would cause the program termination to hang
endlessly. 

Diez