code: def parse_tweets(raw_tweets, source, now=None):
      
      if now is None:
          now = datetime.now(timezone.utc)
  
      tweets = []
      for line in raw_tweets:
          try:
              tweet = parse_tweet(line, source, now)
          except (ValueError, OverflowError) as e:
              logger.debug("{0} - {1}".format(source.url, e))
          else:
              tweets.append(tweet)
  
      return tweets
docs: Parses a list of raw tweet lines from a twtxt file
          and returns a list of :class:`Tweet` objects.
  
          :param list raw_tweets: list of raw tweet lines
          :param Source source: the source of the given tweets
          :param Datetime now: the current datetime
  
          :returns: a list of parsed tweets :class:`Tweet` objects
          :rtype: list