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"""
SPARQL Queries be prepared (i.e parsed and translated to SPARQL algebra)
by the :meth:`rdflib.plugins.sparql.prepareQuery` method.
When executing, variables can be bound with the
``initBindings`` keyword parameter
"""
import rdflib
from rdflib.plugins.sparql import prepareQuery
from rdflib.namespace import FOAF
if __name__ == "__main__":
q = prepareQuery(
"SELECT ?s WHERE { ?person foaf:knows ?s .}", initNs={"foaf": FOAF}
)
g = rdflib.Graph()
g.load("foaf.n3", format="n3")
tim = rdflib.URIRef("http://www.w3.org/People/Berners-Lee/card#i")
for row in g.query(q, initBindings={"person": tim}):
print(row)
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