Using the tweepy library to stream tweets has a catch. There is no built-in feature that allows you to stop streaming after a fixed time. To avoid manually terminating the stream, this code proposes a simple solution without any (complex) multi-threading.

streamer.py

import os
import time
import tweepy

from tweepy import OAuthHandler
from tweepy import Stream
from tweepy import StreamListener


def authenticate():
    '''Use credentials to authenticate user'''
    consumerkey = os.environ.get('CONSUMER_KEY')
    consumersecret = os.environ.get('CONSUMER_SECRET')
    accesstoken = os.environ.get('ACCESS_TOKEN')
    accesssecret = os.environ.get('ACCESS_SECRET')
    auth = OAuthHandler(consumerkey, consumersecret)
    auth.set_access_token(accesstoken, accesssecret)
    api = tweepy.API(auth)
    return auth, api


if __name__ == "__main__":
    auth, api = authenticate()
    
    '''Live streaming tweets for a specific interval of time'''
    runtime = 60 #Tracking for 60 seconds
    tweetstream = Stream(auth, StreamListener())
    tweetstream.filter(track=['twitter'], is_async=True)
    time.sleep(runtime)
    tweetstream.disconnect()

@AparaV, it's the only thread. I think the issue might be that the thread where stream.filter is being ran doesn't terminate. Thanks anyways! I'll investigate the issue.