python退出無限while循環與KeyboardInterrupt異常

Question

當按下Ctrl + C時，我的while循環不會退出。它似乎忽略了我的KeyboardInterrupt異常。環路部分看起來是這樣的：

while True: 
    try: 
    if subprocess_cnt <= max_subprocess: 
     try: 
     notifier.process_events() 
     if notifier.check_events(): 
      notifier.read_events() 
     except KeyboardInterrupt: 
     notifier.stop() 
     break 
    else: 
     pass 
    except (KeyboardInterrupt, SystemExit): 
    print '\nkeyboardinterrupt found!' 
    print '\n...Program Stopped Manually!' 
    raise 

同樣，我不知道是什麼問題，但我從來沒有終端甚至打印兩個打印提醒我在我的異常。有人可以幫我解決這個問題嗎？

Answer 1

與raise語句替換您break聲明，如下圖所示：

while True: 
    try: 
    if subprocess_cnt <= max_subprocess: 
     try: 
     notifier.process_events() 
     if notifier.check_events(): 
      notifier.read_events() 
     except KeyboardInterrupt: 
     notifier.stop() 
     print 'KeyboardInterrupt caught' 
     raise # the exception is re-raised to be caught by the outer try block 
    else: 
     pass 
    except (KeyboardInterrupt, SystemExit): 
    print '\nkeyboardinterrupt caught (again)' 
    print '\n...Program Stopped Manually!' 
    raise 

在except塊的兩個打印語句應執行「（再次）」出現的第二位。