CODEWITHSUNDEEP
pythonsparqldbpediavirtuososparqlwrapper
Mohammed Esam
Mohammed Esam

Reputation: 3

SPARQL query limited results

I have this function:

`def get_author_books():
    sparql = SPARQLWrapper('https://dbpedia.org/sparql')
    sparql.setQuery("""
    SELECT distinct ?s ?author
    WHERE{ ?s rdf:type dbo:Book .
    ?s rdfs:label ?bookLabel . 
      FILTER(LANGMATCHES(LANG(?bookLabel), 'en')) 

    ?s dbo:author ?author . 
    ?author rdfs:label ?authorLabel . 
      FILTER(LANGMATCHES(LANG(?authorLabel), 'en')) 
    ?authorLabel bif:contains "St" 
    OPTIONAL {{ ?s dbp:country ?country .
              ?country rdfs:label ?countryLabel .
                 FILTER(LANGMATCHES(LANG(?countryLabel), 'en')) }}
    OPTIONAL {{ ?s dbo:literaryGenre ?genre .
              ?genre rdfs:label ?genreLabel .
                 FILTER(LANGMATCHES(LANG(?genreLabel), 'en')) }}
    OPTIONAL {{ ?s dbp:language ?language .
              ?language rdfs:label ?languageLabel .
                 FILTER(LANGMATCHES(LANG(?languageLabel), 'en')) }}
    } """)

    sparql.setReturnFormat(JSON)
    qres = sparql.query().convert()
    info = []
    for i in range(len(qres)):
        result = qres['results']['bindings'][i]
        author, book = (result['author']['value']).split('/')[-1], (result['s']['value']).split('/')[-1]
        info.append((author, book))
    print(info)
    print(len(qres))
    return info`

when I run the code I only get 2 results : [('Lucia_St._Clair_Robson', 'Ride_the_Wind'), ('Lucia_St._Clair_Robson', 'Fearless,_A_Novel_of_Sarah_Bowman')] 2 . While, in reality, the query has more than 20 results...appreciate your help

Upvotes: 0

Views: 69

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