我如何忽略我已经在Tweepy中转发的推文？

import tweepy

# 设置Twitter API的密钥和访问令牌
consumer_key = 'YOUR_CONSUMER_KEY'
consumer_secret = 'YOUR_CONSUMER_SECRET'
access_token = 'YOUR_ACCESS_TOKEN'
access_token_secret = 'YOUR_ACCESS_TOKEN_SECRET'

# 进行身份验证
auth = tweepy.OAuthHandler(consumer_key, consumer_secret)
auth.set_access_token(access_token, access_token_secret)

# 创建StreamListener类的子类
class MyStreamListener(tweepy.StreamListener):
    def on_status(self, status):
        if not status.retweeted:  # 如果推文未被转发
            print(status.text)  # 打印推文内容
            # 进行其他操作，例如转发推文等

# 创建Stream对象并设置监听器
myStreamListener = MyStreamListener()
myStream = tweepy.Stream(auth=auth, listener=myStreamListener)

# 过滤推文流，可以根据关键词、用户等进行过滤
myStream.filter(track=['keyword1', 'keyword2'])

# 运行监听器，开始获取和处理推文
myStream.userstream()