Classify tweet or tweets
        :param tweets: String or array of strings to classify.
        :return: String or array of strings depicting sentiment. Sentiment can be POSITIVE, NEGATIVE or NEUTRAL.

def classify(self, tweets):
        """
        Classify tweet or tweets
        :param tweets: String or array of strings to classify.
        :return: String or array of strings depicting sentiment. Sentiment can be POSITIVE, NEGATIVE or NEUTRAL.
        """
        if type(tweets) == str:
            return self.classifier.classify(tweets)

        return list(map(lambda tweet: self.classifier.classify(tweet), tweets))