Here I define a Tweet listener that creates a file called 'tweets.txt', collects streaming tweets as .jsons and writes them to the file 'tweets.txt'; once 100 tweets have been streamed, the listener closes the file and stops listening.

tweet_listener.py

# forked from hugobowne/tweet_listener.py

class MyStreamListener(tweepy.StreamListener):
    """
    Inheriting tweepy.StreamListener object class
    Appears like we're doing this to add the 
    self.num_tweets and self.file attributes
    to the initialization operator.
    """"
    def __init__(self, api=None):
        # super() allows us to access the superclass
        # This is the Python 2 syntax for accessing super
        # super(this_class,self).__init__()
        # Python 3 syntax allows you to 
        super(MyStreamListener, self).__init__()
        self.num_tweets = 0
        self.file = open("tweets.txt", "w")

    # Modify SteamListener.on_status method
    # 
    def on_status(self, status):
        """Called when a new status arrives"""
        tweet = status._json
        self.file.write( json.dumps(tweet) + '\n' )
        self.num_tweets += 1
        if self.num_tweets < 100:
            return True
        else:
            return False
        self.file.close()

    def on_error(self, status):
        """Called when a non-200 status code is returned"""
        print(status)
   
"""
methods from tweepy.StreamListener object class:
on_connect(self) 
on_data(self, raw_data) 
keep_alive(self): Called when a keep-alive arrived
on_status(self, status): Called when a new status arrives
on_exception(self, exception): Called when an unhandled exception occurs.
on_delete(self, status_id, user_id): Called when a delete notice arrives for a status
on_event(self, status): Called when a new event arrives
on_direct_message(self, status): Called when a new direct message arrives
on_friends(self, friends): Called when a friends list arrives. friends is a list that contains user_id
on_limit(self, track): Called when a limitation notice arrives
on_error(self, status_code): Called when a non-200 status code is returned
on_timeout(self): Called when stream connection times out
on_disconnect(self, notice): Called when twitter sends a disconnect notice. Disconnect codes are listed here: https://dev.twitter.com/docs/streaming-apis/messages Disconnect_messages_disconnect
on_warning(self, notice): Called when a disconnection warning message arrives
"""