Tweepy 4.0："'Listener‘对象没有’running‘属性“错误？

import tweepy

class MyStreamListener(tweepy.StreamListener):
    def on_connect(self):
        print("Listener connected to Twitter stream")

    def on_status(self, status):
        # 处理推文
        pass

# 创建监听器对象
my_listener = MyStreamListener()

# 创建认证对象
auth = tweepy.OAuthHandler(consumer_key, consumer_secret)
auth.set_access_token(access_token, access_token_secret)

# 创建API对象
api = tweepy.API(auth)

# 创建流对象
my_stream = tweepy.Stream(auth=api.auth, listener=my_listener)

# 启动监听器
my_stream.filter(track=['keyword'])