6

我需要编写一个程序来将三元组添加到 Virtuoso Triplestore，我正在使用 Python 和 RDFLib。我已经安装了 Virtuoso 插件并尝试了http://pythonhosted.org/virtuoso/rdflib.html#virtuoso-storage中的连接。我有：

from rdflib.graph import ConjunctiveGraph as Graph
from rdflib.store import Store
from rdflib.plugin import get as plugin
from rdflib.term import URIRef, Literal

Virtuoso = plugin("Virtuoso", Store)
store = Virtuoso("DSN=VOS;UID=dba;PWD=dba;WideAsUTF16=Y")

似乎没有问题，问题是：现在呢？如何添加新的三元组？我试过了：

default_graph_uri = "http://llisa.dlsi.uji.es/productset/"
graph = Graph(store,identifier = URIRef(default_graph_uri))
graph.add((URIRef("http://llisa.dlsi.uji.es/productset#0g9x91t"),URIRef("http://xmlns.com/foaf/0.1/nick"),Literal("The Car")))
store.commit()
print graph.serialize(format='pretty-xml')

产生以下错误：

File "/usr/local/lib/python2.7/dist-packages/virtuoso-0.12-py2.7.egg/virtuoso/vstore.py", line 345, in resolve
(value, dvtype, dttype, flag, lang, dtype) = args
ValueError: need more than 4 values to unpack

问题是这有什么问题？以及如何正确添加三元组？谢谢。

4

0 回答 0