code: def get_msg_pending(self, channel, flags):
          
          count = DWORD(0)
          UcanGetMsgPending(self._handle, channel, flags, byref(count))
          return count.value
docs: Returns the number of pending CAN messages.
  
          :param int channel: CAN channel, to be used (:data:`Channel.CHANNEL_CH0` or :data:`Channel.CHANNEL_CH1`).
          :param int flags: Flags specifies which buffers should be checked (see enum :class:`PendingFlags`).
          :return: The number of pending messages.
          :rtype: int