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Message: [QUOTE="Jean-Yves Nief, post: 1749572"] hi all, I would like to know how I can retrieve in my main program the return code from a thread that I launched: class example(threading.Thread): def __init__(self, filename): self.filename = filename threading.Thread.__init__(self) self.start() def run(self): ........ rc = os.system("command example") in the main thread: ...... thrdExample = [] thrdExample.append(example(file)) ...... # once it's not active anymore, test of the return code for thrdExample[i] ?? thanks in advance, JY[/i] [/QUOTE]