def serialize(self, stream=None, rdf_format='trig', **kwargs):
"""
Serializes a :class:`~prov.model.ProvDocument` instance to
`Prov-O <https://www.w3.org/TR/prov-o/>`_.
:param stream: Where to save the output.
"""
container = self.encode_document(self.document)
newargs = kwargs.copy()
newargs['format'] = rdf_format
if newargs['format'] == 'trig':
gr = ConjunctiveGraph()
gr.context_aware = True
gr.parse(data=container.serialize(format='nquads'),
format='nquads')
for namespace in container.namespaces():
if namespace not in list(gr.namespaces()):
gr.bind(namespace[0], namespace[1])
container = gr
if six.PY2:
buf = io.BytesIO()
try:
container.serialize(buf, **newargs)
buf.seek(0, 0)
# Right now this is a bytestream. If the object to stream to is
# a text object is must be decoded. We assume utf-8 here which
# should be fine for almost every case.
if isinstance(stream, io.TextIOBase):
stream.write(buf.read().decode('utf-8'))
else:
stream.write(buf.read())
finally:
buf.close()
else:
buf = io.BytesIO()
try:
container.serialize(buf, **newargs)
buf.seek(0, 0)
# Right now this is a bytestream. If the object to stream to is
# a text object is must be decoded. We assume utf-8 here which
# should be fine for almost every case.
if isinstance(stream, io.TextIOBase):
stream.write(buf.read().decode('utf-8'))
else:
stream.write(buf.read()) #.encode('utf-8'))
finally:
buf.close()
def serialize(self, stream=None, rdf_format='trig', **kwargs):
"""
Serializes a :class:`~prov.model.ProvDocument` instance to
`Prov-O <https://www.w3.org/TR/prov-o/>`_.
:param stream: Where to save the output.
"""
container = self.encode_document(self.document)
newargs = kwargs.copy()
newargs['format'] = rdf_format
if newargs['format'] == 'trig':
gr = ConjunctiveGraph()
gr.context_aware = True
gr.parse(data=container.serialize(format='nquads'), format='nquads')
for namespace in container.namespaces():
if namespace not in list(gr.namespaces()):
gr.bind(namespace[0], namespace[1])
container = gr
if six.PY2:
buf = io.BytesIO()
try:
container.serialize(buf, **newargs)
buf.seek(0, 0)
# Right now this is a bytestream. If the object to stream to is
# a text object is must be decoded. We assume utf-8 here which
# should be fine for almost every case.
if isinstance(stream, io.TextIOBase):
stream.write(buf.read().decode('utf-8'))
else:
stream.write(buf.read())
finally:
buf.close()
else:
buf = io.BytesIO()
try:
container.serialize(buf, **newargs)
buf.seek(0, 0)
# Right now this is a bytestream. If the object to stream to is
# a text object is must be decoded. We assume utf-8 here which
# should be fine for almost every case.
if isinstance(stream, io.TextIOBase):
stream.write(buf.read().decode('utf-8'))
else:
stream.write(buf.read()) #.encode('utf-8'))
finally:
buf.close()
# with the object init (and it added some namespaces as well)
# By default, your main namespace is the URI of your
# current working directory, so lets make that simpler:
myNS = Namespace(URIRef('http://www.w3.org/2000/10/swap/Primer#'))
primer.bind('', myNS)
primer.bind('owl', 'http://www.w3.org/2002/07/owl#')
primer.bind('dc', 'http://purl.org/dc/elements/1.1/')
primer.bind('swap', 'http://www.w3.org/2000/10/swap/')
sourceCode = StringInputSource(mySource, myNS)
# Lets load it up!
primer.parse(sourceCode, format='n3')
# Now you can query, either directly straight into a list:
[(x, y, z) for x, y, z in primer]
# or spit it back out (mostly) the way we created it:
print primer.serialize(format='n3')
# for more insight into things already done, lets see the namespaces
list(primer.namespaces())
# lets ask something about the data
list(primer.objects(myNS.pat, myNS.child))
class TestLevelDBConjunctiveGraphCore(unittest.TestCase):
def setUp(self):
store = "LevelDB"
self.graph = ConjunctiveGraph(store=store)
self.path = configString
self.graph.open(self.path, create=True)
def tearDown(self):
self.graph.destroy(self.path)
try:
self.graph.close()
except:
pass
if getattr(self, 'path', False) and self.path is not None:
if os.path.exists(self.path):
if os.path.isdir(self.path):
for f in os.listdir(self.path):
os.unlink(self.path + '/' + f)
os.rmdir(self.path)
elif len(self.path.split(':')) == 1:
os.unlink(self.path)
else:
os.remove(self.path)
def test_namespaces(self):
self.graph.bind("dc", "http://http://purl.org/dc/elements/1.1/")
self.graph.bind("foaf", "http://xmlns.com/foaf/0.1/")
self.assert_(len(list(self.graph.namespaces())) == 5)
self.assert_(('foaf', rdflib.term.URIRef(u'http://xmlns.com/foaf/0.1/')
) in list(self.graph.namespaces()))
def test_readable_index(self):
print(readable_index(111))
def test_triples_context_reset(self):
michel = rdflib.URIRef(u'michel')
likes = rdflib.URIRef(u'likes')
pizza = rdflib.URIRef(u'pizza')
cheese = rdflib.URIRef(u'cheese')
self.graph.add((michel, likes, pizza))
self.graph.add((michel, likes, cheese))
self.graph.commit()
ntriples = self.graph.triples((None, None, None),
context=self.graph.store)
self.assert_(len(list(ntriples)) == 2)
def test_remove_context_reset(self):
michel = rdflib.URIRef(u'michel')
likes = rdflib.URIRef(u'likes')
pizza = rdflib.URIRef(u'pizza')
cheese = rdflib.URIRef(u'cheese')
self.graph.add((michel, likes, pizza))
self.graph.add((michel, likes, cheese))
self.graph.commit()
self.graph.store.remove((michel, likes, cheese), self.graph.store)
self.graph.commit()
self.assert_(
len(
list(
self.graph.triples((None, None, None),
context=self.graph.store))) == 1)
def test_remove_db_exception(self):
michel = rdflib.URIRef(u'michel')
likes = rdflib.URIRef(u'likes')
pizza = rdflib.URIRef(u'pizza')
cheese = rdflib.URIRef(u'cheese')
self.graph.add((michel, likes, pizza))
self.graph.add((michel, likes, cheese))
self.graph.commit()
self.graph.store.__len__(context=self.graph.store)
self.assert_(
len(
list(
self.graph.triples((None, None, None),
context=self.graph.store))) == 2)
class TestKyotoCabinetConjunctiveGraphCore(unittest.TestCase):
def setUp(self):
store = "KyotoCabinet"
self.graph = ConjunctiveGraph(store=store)
self.path = configString
self.graph.open(self.path, create=True)
def tearDown(self):
self.graph.destroy(self.path)
try:
self.graph.close()
except:
pass
if getattr(self, "path", False) and self.path is not None:
if os.path.exists(self.path):
if os.path.isdir(self.path):
for f in os.listdir(self.path):
os.unlink(self.path + "/" + f)
os.rmdir(self.path)
elif len(self.path.split(":")) == 1:
os.unlink(self.path)
else:
os.remove(self.path)
def test_namespaces(self):
self.graph.bind("dc", "http://http://purl.org/dc/elements/1.1/")
self.graph.bind("foaf", "http://xmlns.com/foaf/0.1/")
self.assert_(len(list(self.graph.namespaces())) == 5)
self.assert_(("foaf", rdflib.term.URIRef(u"http://xmlns.com/foaf/0.1/")) in list(self.graph.namespaces()))
def test_play_journal(self):
self.assertRaises(NotImplementedError, self.graph.store.play_journal, {"graph": self.graph})
def test_readable_index(self):
print(readable_index(111))
def test_triples_context_reset(self):
michel = rdflib.URIRef(u"michel")
likes = rdflib.URIRef(u"likes")
pizza = rdflib.URIRef(u"pizza")
cheese = rdflib.URIRef(u"cheese")
self.graph.add((michel, likes, pizza))
self.graph.add((michel, likes, cheese))
self.graph.commit()
ntriples = self.graph.triples((None, None, None), context=self.graph.store)
self.assert_(len(list(ntriples)) == 2)
def test_remove_context_reset(self):
michel = rdflib.URIRef(u"michel")
likes = rdflib.URIRef(u"likes")
pizza = rdflib.URIRef(u"pizza")
cheese = rdflib.URIRef(u"cheese")
self.graph.add((michel, likes, pizza))
self.graph.add((michel, likes, cheese))
self.graph.commit()
self.graph.store.remove((michel, likes, cheese), self.graph.store)
self.graph.commit()
self.assert_(len(list(self.graph.triples((None, None, None), context=self.graph.store))) == 1)
def test_remove_db_exception(self):
michel = rdflib.URIRef(u"michel")
likes = rdflib.URIRef(u"likes")
pizza = rdflib.URIRef(u"pizza")
cheese = rdflib.URIRef(u"cheese")
self.graph.add((michel, likes, pizza))
self.graph.add((michel, likes, cheese))
self.graph.commit()
self.graph.store.__len__(context=self.graph.store)
self.assert_(len(list(self.graph.triples((None, None, None), context=self.graph.store))) == 2)
myNS = Namespace(URIRef('http://www.w3.org/2000/10/swap/Primer#'))
primer.bind('', myNS)
primer.bind('owl', 'http://www.w3.org/2002/07/owl#')
primer.bind('dc', 'http://purl.org/dc/elements/1.1/')
primer.bind('swap', 'http://www.w3.org/2000/10/swap/')
sourceCode = StringInputSource(mySource, myNS)
# Lets load it up!
primer.parse(sourceCode, format='n3')
# Now you can query, either directly straight into a list:
[(x, y, z) for x, y, z in primer]
# or spit it back out (mostly) the way we created it:
print primer.serialize(format='n3')
# for more insight into things already done, lets see the namespaces
list(primer.namespaces())
# lets ask something about the data
list(primer.objects(myNS.pat, myNS.child))
