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POpython 2.6.x theading / signals /atexit fail on some versions?
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copied!<p>I've seen a lot of questions related to this... but my code <em>works</em> on python 2.6.2 and <em>fails</em> to work on python 2.6.5. Am I wrong in thinking that the whole atexit "functions registered via this module are not called when the program is killed by a signal" thing shouldn't count here because I'm catching the signal and then exiting cleanly? What's going on here? Whats the proper way to do this?</p> <pre><code>import atexit, sys, signal, time, threading terminate = False threads = [] def test_loop(): while True: if terminate: print('stopping thread') break else: print('looping') time.sleep(1) @atexit.register def shutdown(): global terminate print('shutdown detected') terminate = True for thread in threads: thread.join() def close_handler(signum, frame): print('caught signal') sys.exit(0) def run(): global threads thread = threading.Thread(target=test_loop) thread.start() threads.append(thread) while True: time.sleep(2) print('main') signal.signal(signal.SIGINT, close_handler) if __name__ == "__main__": run() </code></pre> <p>python 2.6.2:</p> <pre><code>$ python halp.py looping looping looping main looping main looping looping looping main looping ^Ccaught signal shutdown detected stopping thread </code></pre> <p>python 2.6.5:</p> <pre><code>$ python halp.py looping looping looping main looping looping main looping looping main ^Ccaught signal looping looping looping looping ... looping looping Killed <- kill -9 process at this point </code></pre> <p>The main thread on 2.6.5 appears to never execute the atexit functions.</p>

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