resource_example

RDFLib has a Resource class, for a resource-centric API. The Graph class also has a resource function that can be used to create resources and manipulate them by quickly adding or querying for triples where this resource is the subject.

This example shows g.resource() in action.

Attributes:

• bill –
• bob –
• g –

bill module-attribute

bill = resource('http://example.com/bill')

bob module-attribute

bob = resource('http://example.com/bob')

g module-attribute

g = Graph()

e: false show_docstring_attributes: false show_docstring_functions: false show_docstring_modules: false show_docstring_classes: false show_signature: false show_signature_annotations: false show_signature_type_parameters: false show_docstring_other_parameters: false show_docstring_parameters: false show_docstring_raises: false show_docstring_receives: false show_docstring_returns: false summary: false show_if_no_docstring: false

from rdflib import RDF, RDFS, Graph, Literal
from rdflib.namespace import FOAF

if __name__ == "__main__":
    g = Graph()

    # Create a Resource within graph g
    bob = g.resource("http://example.com/bob")
    # .set replaces all other values
    bob.set(RDF.type, FOAF.Person)
    bob.set(FOAF.name, Literal("Bob"))

    bill = g.resource("http://example.com/bill")
    # .add adds to existing values
    bill.add(RDF.type, FOAF.Person)
    bill.add(RDF.type, FOAF.Agent)
    bill.set(RDFS.label, Literal("Bill"))

    bill.add(FOAF.knows, bob)

    # Resources returned when querying are 'auto-boxed' as resources:
    print(f"Bill knows: {bill.value(FOAF.knows).value(FOAF.name)}")

    # Slicing ([] syntax) can also be used:
    for friend in bill[FOAF.knows]:
        print(f"Bill knows: {next(friend[FOAF.name])}")

    # Or even quicker with paths:
    for friend in bill[FOAF.knows / FOAF.name]:
        print(f"Bill knows: {friend}")

    # Setting single properties is also possible:
    bill[RDFS.label] = Literal("William")