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"""
RDFLib Graphs (and Resources) can be "sliced" with [] syntax
This is a short-hand for iterating over triples.
Combined with SPARQL paths (see ``foafpaths.py``) - quite complex queries
can be realised.
See :meth:`rdflib.graph.Graph.__getitem__` for details
"""
from rdflib import Graph, RDF
from rdflib.namespace import FOAF
if __name__ == "__main__":
graph = Graph()
graph.load("foaf.n3", format="n3")
for person in graph[: RDF.type: FOAF.Person]:
friends = list(graph[person: FOAF.knows * "+" / FOAF.name])
if friends:
print(f"{graph.value(person, FOAF.name)}'s circle of friends:")
for name in friends:
print(name)
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