retrieving object based on its URI using RDFAlchemy and rdflib

Question

I am using RDFAlchemy and rdflib graph for the source of the data, i.e. rdfalchemy.rdfSubject.db. How can I have rdfalchemy map an object if I have its uri? calling the constructor with the uri creates an object but doesn't retrieve values of other properties from the graph. Using get_by(resUri='http://...') yields an AttributeError

class Book(rdfAlchemy.rdfSubject):
  rdf_type = BIBO.Book
  isbn = rdfalchemy.rdfSingle(BIBO.isbn10)
Book.get_by(resUri='') # AttributeError
b = Book(uri) #a book identified with uri exists in the data 
b.title #empty string

score 3 · Accepted Answer · answered May 22 '12 at 18:13

3

I guess should be something like:

b = Book(URIRef(uri))

answered May 22 '12 at 18:13

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+1 Too bad it was never accepted. This was (and still is) the right answer. Note: I'm the creator of rdfAlchemy. – Phil Cooper Jun 23 '12 at 20:04

retrieving object based on its URI using RDFAlchemy and rdflib

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