python退出無限循環與KeyboardInterrupt異常

參考:http://www.voidcn.com/article/p-pmlncsni-bvo.html

 

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.循環部分如下所示：

 

 

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

同樣,我不確定問題是什么,但我的終端甚至從未打印過我的異常中的兩個打印警報.有人能幫我解決這個問題嗎？

 

用raise語句替換break語句,如下所示：

 

 

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

except塊中的兩個print語句應該以'(再次)’出現的第二個執行.