python线程和锁的应用,执行查看效果
2022/6/25 14:23:49
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import threading from atexit import register from random import randrange from threading import Thread, Lock from time import sleep, ctime lock = Lock() loops = (randrange(2, 5) for x in range(randrange(3, 7))) print(loops) class CleanOutputSet(set): def __str__(self): return ','.join(x for x in self) remaining = CleanOutputSet() def loop(sec): myname = threading.current_thread().name with lock: remaining.add(myname) print('[%s] started %s' % (ctime(), myname)) sleep(sec) with lock: remaining.remove(myname) print('[%s] completed %s (%d sec)' % (ctime(), myname, sec)) print('remaining : %s' % (remaining or 'None')) def _main(): for p in loops: Thread(target=loop, args=(p,)).start() @register def _atexit(): print('all done at:', ctime()) if __name__ == '__main__': _main() # for i in loops: # print(i)
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