negation_detection.py 文件源码

def findSentencePTreeToken(sentence, keyword):
    import nltk
    from nltk.tree import ParentedTree
    stemmed = _lemma_(keyword)

    tmp = proc.parse_doc(sentence)
    i = 0
    numSentences = len(tmp['sentences'])
    rs = []
    for i in range(0, numSentences):
        p = tmp['sentences'][i]['parse']
        ptree = ParentedTree.fromstring(p)

        # rs = []
        for i in range(0, len(ptree.leaves())):
            tree_position = ptree.leaf_treeposition(i)

            node = ptree[tree_position]

            if _stem_(node)==stemmed:
                tree_position = tree_position[0:len(tree_position)-1]
                rs.append(ptree[tree_position])
        # if len(rs)>0:
        #   return rs
    return rs