Question

我已经阅读了一些关于在Lucene中突出显示搜索词的教程，并提出了一段代码：

(...)
query = parser.parse(query_string)

for scoreDoc in  searcher.search(query, 50).scoreDocs:
    doc = searcher.doc(scoreDoc.doc)
    filename = doc.get("filename")
    print filename
    found_paraghaph = fetch_from_my_text_library(filename)

    stream = lucene.TokenSources.getTokenStream("contents", found_paraghaph, analyzer);
    scorer = lucene.Scorer(query, "contents", lucene.CachingTokenFilter(stream))
    highligter = lucene.Highligter(scorer)
    fragment = highligter.getBestFragment(analyzer, "contents", found_paraghaph)
    print '>>>' + fragment

但这一切都以错误结束：

Traceback (most recent call last):
  File "./search.py", line 76, in <module>
    scorer = lucene.Scorer(query, "contents", lucene.CachingTokenFilter(stream))
NotImplementedError: ('instantiating java class', <type 'Scorer'>)

所以，我想，这部分Lucene还没有在pyLucene中补充。还有其他办法吗？

Answer 1

我也有类似的错误。我认为这个类的包装器还没有为Pylucene v3.6实现。

您可能需要尝试以下操作：

analyzer = StandardAnalyzer(Version.LUCENE_CURRENT)

# Constructs a query parser.
queryParser = QueryParser(Version.LUCENE_CURRENT, FIELD_CONTENTS, analyzer)

# Create a query
query = queryParser.parse(QUERY_STRING)

topDocs = searcher.search(query, 50)

# Get top hits
scoreDocs = topDocs.scoreDocs
print "%s total matching documents." % len(scoreDocs)

HighlightFormatter = SimpleHTMLFormatter();
highlighter = Highlighter(HighlightFormatter, QueryScorer (query))

for scoreDoc in scoreDocs:
    doc = searcher.doc(scoreDoc.doc)
    text = doc.get(FIELD_CONTENTS)
    ts = analyzer.tokenStream(FIELD_CONTENTS, StringReader(text))
    print doc.get(FIELD_PATH)
    print highlighter.getBestFragments(ts, text, 3, "...")
    print ""

请注意，我们会为搜索结果中的每个项目创建令牌流。

如何在pyLucene中使用荧光笔？

1 个答案: