feature_construction.py 文件源码

def _first_tagger_before_answer_span(self, question):
        """Get the first tagger before answer span
        - Args:
            question(string): string of current question 
        - Returns:
            tagger(string): tagger of first term before span
        """
        index = 0
        text = nltk.word_tokenize(question)
        post = nltk.pos_tag(text)
        for idx, t in enumerate(post):
            if t[0] == "_____":
                index = idx - 1
                break
        try:
            return post[index][1]
        except IndexError:
            return 'dummy'