- Python language
- RDF-databases (Redland)
- mapping RDF data to Python classes
Flyingfish is written and tested as a part of Django-based site, used in ExtMem.com project.
The lib binds Redland (RDF triple storage) to hi-level python classes. Current version is typeless and doesn't care about RDF-schema.
from flyingfish.client import RDFconnection
#to inticialize DB run once with startnew=True
connection = RDFconnection(model="test_storage1", storage="postgresql", startnew=False,
options = "host='127.0.0.1',database='rdfdb',user='root','password=''")
client = connection.client()
URI = "http://www.pleso.net/rdf/#"
#create named resource
root = client.get(URI + 'root')
person1 = client.get(URI + 'p1')
#attribute access to statements, useful for rendering in templates
person1.rdf_type = 'foaf:Person'
person1.foaf_name = 'Alex'
person1.ext_tag = 'developer'
person2 = client.get(URI + 'p2')
person2['rdf:type'] = 'foaf:Person'
person2['foaf:name'] = 'Nick'
person2['ext:tag'] = 'developer'
person2['ext:tag'] = 'designer'
person1['foaf:knows'] = person2
root.ext_all = URI + 'p1'
root['ext:all'] = person2
from flyingfish.utils import modeldump
print 'FULL DUMP \n', modeldump(client.model)
#get resource by URI
resource = client.get(URI + 'p1')
print 'INTROSPECT RESOURCE BY URI \n',resource.cache_introspect()
people = client.query('foaf:Person', '?uri foaf:name "Nick"',["foaf"])
print 'SIMPLE QUERY RESULT \n', peopleFULL DUMP
Statement: {[http://www.pleso.net/rdf/#p1], [http://www.w3.org/1999/02/22-rdf-syntax-ns#type], [http://xmlns.com/foaf/0.1/Person]}
Statement: {[http://www.pleso.net/rdf/#p1], [http://xmlns.com/foaf/0.1/name], "Alex"}
Statement: {[http://www.pleso.net/rdf/#p1], [http://extmem.com/rdfs/ext/tag], "developer"}
Statement: {[http://www.pleso.net/rdf/#p2], [http://www.w3.org/1999/02/22-rdf-syntax-ns#type], [http://xmlns.com/foaf/0.1/Person]}
Statement: {[http://www.pleso.net/rdf/#p2], [http://xmlns.com/foaf/0.1/name], "Nick"}
Statement: {[http://www.pleso.net/rdf/#p2], [http://extmem.com/rdfs/ext/tag], "developer"}
Statement: {[http://www.pleso.net/rdf/#p2], [http://extmem.com/rdfs/ext/tag], "designer"}
Statement: {[http://www.pleso.net/rdf/#root], [http://extmem.com/rdfs/ext/all], "http://www.pleso.net/rdf/#p1"}
Statement: {[http://www.pleso.net/rdf/#root], [http://extmem.com/rdfs/ext/all], (r1229485140r7596r1)}
Statement: {[http://www.pleso.net/rdf/#p1], [http://xmlns.com/foaf/0.1/knows], (r1229485451r7881r1)}
INTROSPECT RESOURCE BY URI
http://www.pleso.net/rdf/#p1 {
foaf:knows: (r1229485451r7881r1)
rdf:type: http://xmlns.com/foaf/0.1/Person
ext:tag: developer
foaf:name: Alex
}
SIMPLE QUERY RESULT
http://www.pleso.net/rdf/#p2
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