def get(self, message_class):

    if self.items not in message_class.MESSAGE_TYPE_ID:
      return message_class()
    item = self.items[message_class.MESSAGE_TYPE_ID]
    if item.Parse(message_class):
      return item.message
    else:
      return message_class()
dataset/ETHPy150Open AppScale/appscale/AppServer/google/net/proto/message_set.py/MessageSet.get/swapped operands of `not in`