util_sparql_client.py

# The MIT License
#
#  Copyright 2018-2020 Hans-Georg Becker <https://orcid.org/0000-0003-0432-294X>
#
#  Permission is hereby granted, free of charge, to any person obtaining a copy
#  of this software and associated documentation files (the "Software"), to deal
#  in the Software without restriction, including without limitation the rights
#  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#  copies of the Software, and to permit persons to whom the Software is
#  furnished to do so, subject to the following conditions:
#
#  The above copyright notice and this permission notice shall be included in
#  all copies or substantial portions of the Software.
#
#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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from SPARQLWrapper import SPARQLWrapper, JSON

SPARQL_ENDPOINT = 'http://localhost:7200/repositories/VirtuelleSystematik'


def sparql_query(query=None, endpoint=SPARQL_ENDPOINT):

    if query:
        sparql = SPARQLWrapper(endpoint)
        sparql.setQuery(query)

        sparql.setReturnFormat(JSON)

        return sparql.query().convert()["results"]["bindings"]
    else:
        raise ValueError('Query is empty!')