余弦得分在嗖，python

Question

我已经实现了一些python代码来运行使用BM25的whoosh上的搜索，并且都出去了，但现在我正在尝试将得分机制更改为余弦，我得到这个错误：

File "TFIDF.py", line 18, in tfidf with ix.searcher(weighting=whoosh.scoring.Cosine()) as searcher: AttributeError: 'module' object has no attribute 'Cosine'

如果我输入余弦

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ideias ???

谢谢！

Answer 1

关于http://pythonhosted.org/Whoosh/searching.html#the-searcher-object的文档，我假设您正在查看的内容不正确，因为您已经找到。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。