"""

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.rdf")

    for person in graph[: RDF.type : FOAF.Person]:

        friends = list(graph[person:FOAF.knows * '+'/FOAF.name])
        if friends: 
            print "%s's circle of friends:"%graph.value(person, FOAF.name)
            for name in friends:
                print name