def sentiment(self, text, method = "vocabulary"):
        """
        determine the sentiment of the provided text in English language
        @param text: input text to categorize
        @param method: method to use to compute the sentiment. possible values are "vocabulary" (vocabulary based sentiment analysis)
            and "rnn" (neural network based sentiment classification)
        @returns: dict
        """
        assert method == "vocabulary" or method == "rnn"
        endpoint = method == "vocabulary" and "sentiment" or "sentimentRNN"
        return self._er.jsonRequestAnalytics("/api/v1/" + endpoint, { "text": text })
determine the sentiment of the provided text in English language
        @param text: input text to categorize
        @param method: method to use to compute the sentiment. possible values are "vocabulary" (vocabulary based sentiment analysis)
            and "rnn" (neural network based sentiment classification)
        @returns: dict