Whoosh，Python中的余弦评分

Question

我已经实现了一些python代码，以使用BM25在whoosh上运行搜索，但一切正常，但是现在我试图将评分机制更改为Cosine，却遇到了以下错误：

tfidf中的文件“ TFIDF.py”，第18行，以ix.searcher（weighting = whoosh.scoring.Cosine（））作为搜索者：AttributeError：'module'对象没有属性'Cosine'

如果我导入余弦

from whoosh.scoring import Cosine

我得到这个：

File "TFIDF.py", line 4, in <module>
    from whoosh.scoring import Cosine
ImportError: cannot import name Cosine

我的代码如下：

import whoosh
from whoosh.scoring import Cosine
from whoosh.fields import *
from whoosh.scoring import *
from whoosh.qparser import *
from whoosh.query import *
from whoosh.index import open_dir

#Index path
lab3dir= "../lab3/Aula3_1/"
ix = open_dir(lab3dir + "indexdir") #Index generated in previous lab


def cosine(queryTerms):
    list=[]
    dict={} # dict com ID do doc e Similiaridade 
    with ix.searcher(weighting=whoosh.scoring.Cosine()) as searcher:
        query = QueryParser("content", ix.schema, group=OrGroup).parse(u(queryTerms))
        results = searcher.search(query, limit=100)
        for i,r in enumerate(results):
            list.append(r["id"])
            print r, results.score(i)
            dict[r["id"]]= results.score(i)
    return dict

任何想法？

谢谢！

Answer 1

http://pythonhosted.org/Whoosh/searching.html#the-searcher-object上的文档（我认为这是您正在查看的内容）不正确。 查看文档（ http://pythonhosted.org/Whoosh/api/scoring.html#module-whoosh.scoring ）或源代码（ https://bitbucket.org/mchaput/whoosh/src/362fc2999c8cabc51370f433de7402fafd536ec6/src/ whoosh / scoring.py？at = default ）以获取实际可用的选项。