code: def _async_raise(tid, exctype):
      
      tid = ctypes.c_long(tid)
      if not inspect.isclass(exctype):
          exctype = type(exctype)
      res = ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, ctypes.py_object(exctype))
      if res == 0:
          raise ValueError("invalid thread id")
      elif res != 1:
          # """if it returns a number greater than one, you're in trouble,
          # and you should call it again with exc=NULL to revert the effect"""
          ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, None)
          raise SystemError("PyThreadState_SetAsyncExc failed")
      print('force close: {} {}'.format(tid, datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')))
docs: raises the exception, performs cleanup if needed
      参考: https://www.oschina.net/question/172446_2159505