Question

我创建了一个在DBpedia SPARQL端点上执行SPARQL查询的函数。此函数采用15个元素的数组，每次将数组中的元素替换为查询，然后执行它以获得结果。问题是它需要前9个元素然后引发此错误：

results = sparql.query().convert()
  File "build/bdist.linux-i686/egg/SPARQLWrapper/Wrapper.py", line 390, in query
    return QueryResult(self._query())
  File "build/bdist.linux-i686/egg/SPARQLWrapper/Wrapper.py", line 369, in _query
    raise e
HTTPError: HTTP Error 414: Request-URI Too Large

我的查询如下：

sparql = SPARQLWrapper('http://mlode.nlp2rdf.org/sparql');
querystring="""
PREFIX  dc:<http://purl.org/dc/elements/1.1/>
PREFIX  foaf: <http://xmlns.com/foaf/0.1/>
PREFIX  olia-ar: <http://purl.org/olia/arabic_khoja.owl#>
PREFIX  dcterms: <http://purl.org/dc/terms/>
PREFIX  rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX  owl:  <http://www.w3.org/2002/07/owl#>
PREFIX  xsd:  <http://www.w3.org/2001/XMLSchema#>
PREFIX  lexvo: <http://lexvo.org/id/iso639-3/>
PREFIX  rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX  gold: <http://purl.org/linguistics/gold/>
PREFIX  skos: <http://www.w3.org/2004/02/skos/core#>
PREFIX  qvoc: <http://www.nlp2rdf.org/quranvocab#>
SELECT  ?verseTextAr ?tafseer 
WHERE
  {
    ?verse a qvoc:Verse;
     qvoc:chapterIndex 26;
     qvoc:verseIndex  WORD;
     skos:prefLabel ?verseTextAr;
      qvoc:descByJalalayn ?tafseer.
  }
  """

Answer 1

414错误意味着SPARQLWrapper正在尝试为查询执行HTTP GET，但查询过大导致DBPedia服务器拒绝的请求URI。

您需要将SPARQLWrapper改为POST查询，而documentation表明这是可能的，并且似乎应该使用setMethod()方法来配置它。

HTTP错误414，使用SPARQLwrapper查询DBPedia端点

1 个答案: