returning a value from a thread
ken at perfect-image.com
Wed Jul 14 22:04:26 CEST 2004
>>ie. store value in memory from module3 and be able to
>>read it from module1.
>>The closest I can think of is to pass a queue reference
>>and stor values from module3 in the queue and then read them
>>back while in module1.
> Actually, any kind of container object would do: you could pass a list,
> dictionary, or class to the thread, and the thread could store its results
> in it.
This was my orginal problem, being the middle man (module2) that spins
the thread(calling function in module3) has returned to module1 before
the thread result was available. So I couldn't figure a way to get the
result from module3 back to a global var in module1, since middle man
> A hackish method would be to pass the dictionary returned by locals() in
> module1 to the thread. This way the thread could set a value in module1
Hhmmm, interesting, didn't know you could do that. Might have to try it.
> Just don't forget to .join() on the thread in module1 before accessing the
> container object! (Assuming you're using threading) I just wish Python's
> .join() could return values, like pthread_join can.
Using thread here.
But I really have nothing against using queue, I've used queues before
but more for a kind of stream of data and was thinking I was missing
something because I only want to pass back a single value, so Queue(1)
would probally be alright.
Thanks for all the responses.
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