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import logging
# Configure how we want rdflib logger to log messages
_logger = logging.getLogger("rdflib")
_logger.setLevel(logging.DEBUG)
_hdlr = logging.StreamHandler()
_hdlr.setFormatter(logging.Formatter('%(name)s %(levelname)s: %(message)s'))
_logger.addHandler(_hdlr)
from rdflib.graph import Graph
from rdflib.term import URIRef, Literal, BNode
from rdflib.namespace import Namespace, RDF
store = Graph()
# Bind a few prefix, namespace pairs.
store.bind("dc", "http://http://purl.org/dc/elements/1.1/")
store.bind("foaf", "http://xmlns.com/foaf/0.1/")
# Create a namespace object for the Friend of a friend namespace.
FOAF = Namespace("http://xmlns.com/foaf/0.1/")
# Create an identifier to use as the subject for Donna.
donna = BNode()
# Add triples using store's add method.
store.add((donna, RDF.type, FOAF["Person"]))
store.add((donna, FOAF["nick"], Literal("donna", lang="foo")))
store.add((donna, FOAF["name"], Literal("Donna Fales")))
# Iterate over triples in store and print them out.
print "--- printing raw triples ---"
for s, p, o in store:
print s, p, o
# For each foaf:Person in the store print out its mbox property.
print "--- printing mboxes ---"
for person in store.subjects(RDF.type, FOAF["Person"]):
for mbox in store.objects(person, FOAF["mbox"]):
print mbox
# Serialize the store as RDF/XML to the file foaf.rdf.
store.serialize("foaf.rdf", format="pretty-xml", max_depth=3)
# Let's show off the serializers
print "RDF Serializations:"
# Serialize as XML
print "--- start: rdf-xml ---"
print store.serialize(format="pretty-xml")
print "--- end: rdf-xml ---\n"
# Serialize as NTriples
print "--- start: ntriples ---"
print store.serialize(format="nt")
print "--- end: ntriples ---\n"
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