That you're proxying in a Flask app the SPARQl query I think is not
relevant for the issue.

Check the Fuseki documentation:
https://jena.apache.org/documentation/serving_data/#sparql-over-http

Because I think you're pointing to the wrong endpoint. I think it should be
something like /ds/query




On Mon, Sep 10, 2018, 19:32 <[email protected]> wrote:

> I'm trying to implement a sparqlwrapper class in python by using Flask and
> I'm getting a server error 500 while doing so. In the fuseki command line
> it's showing the 400 parse error.
>
> Below is the code that I used to execute the query(I don't know whether it
> is correct or not but just tried to implement it).
>
> Can anyone tell me whether this code is right or not and the corrections
> if possible.
>
> from flask import Flask
> from SPARQLWrapper import SPARQLWrapper, JSON
> app = Flask(__name__)
>
> @app.route('/')
> def hello_world():
> sparql = SPARQLWrapper("http://localhost:3030/BookMashup/sparql";)
> sparql.setQuery("""
>     PREFIX rdfs: <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
>     SELECT ?label
>     WHERE { <http://dbpedia.org/resource/120_Days_of_Sodom> }
>     """)
>    sparql.setReturnFormat(JSON)
>    results = sparql.query().convert()
>
>    for result in results["results"]["bindings"]:
>     print(result["label"]["value"])
>
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