问Tweepy会在我的mac上返回tweet，但不会在ubuntu AWS实例上返回tweet，相反，它会毫无错误地退出

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class CustomStreamListener(tweepy.StreamListener):
    def on_status(self, status):
        print (status.text)

#Sets up our streaming listener
streaming_api = tweepy.streaming.Stream(auth, CustomStreamListener(), timeout = 1000)

#Calls the streaming listener
def streaming():
    try:
        print ("Starting Streaming")
        streaming_api.sample()
        print("Still streaming")
    except Exception as e:
        print (e)
        print (sys.stderr, 'Encountered Exception:', e)
        time.sleep(600)
        streaming()

#Calls our streaming function
streaming()