python – 在rdflib中使用上下文

我很难找到一个明确,明智的rdflib使用上下文的例子.
ConjunctiveGraph不接受上下文,并且不推荐使用Graph.我应该如何在同一个全局ConjunctiveGraph中的不同上下文中创建和操作？

解决方法

是.这是代码

import rdflib
from rdflib.Graph import Graph
 
conj=rdflib.ConjunctiveGraph()
 
NS=rdflib.Namespace("http://example.com/#")
NS_CTX=rdflib.Namespace("http://example.com/context/#")
 
alice=NS.alice
bob=NS.bob
charlie=NS.charlie
 
pizza=NS.pizza
meat=NS.meat
chocolate=NS.chocolate
 
loves=NS.loves
hates=NS.hates
likes=NS.likes
dislikes=NS.dislikes
 
love_ctx=Graph(conj.store,NS_CTX.love)
food_ctx=Graph(conj.store,NS_CTX.food)
 
love_ctx.add( (alice,loves,bob) )
love_ctx.add( (alice,charlie) )
love_ctx.add( (bob,hates,charlie) )
love_ctx.add( (charlie,bob) )
 
food_ctx.add( (alice,likes,chocolate) )
food_ctx.add( (alice,meat) )
food_ctx.add( (alice,dislikes,pizza) )
 
print "Full context"
for t in conj:
    print t
 
print ""
print "Contexts"
for c in conj.contexts():
    print c
 
print "love context"
for t in love_ctx:
    print t
 
print "food context"
for t in food_ctx:
    print t

这是输出

Full context
(rdflib.URIRef('http://example.com/#bob'),rdflib.URIRef('http://example.com/#hates'),rdflib.URIRef('http://example.com/#charlie'))
(rdflib.URIRef('http://example.com/#alice'),rdflib.URIRef('http://example.com/#likes'),rdflib.URIRef('http://example.com/#chocolate'))
(rdflib.URIRef('http://example.com/#alice'),rdflib.URIRef('http://example.com/#meat'))
(rdflib.URIRef('http://example.com/#alice'),rdflib.URIRef('http://example.com/#dislikes'),rdflib.URIRef('http://example.com/#pizza'))
(rdflib.URIRef('http://example.com/#alice'),rdflib.URIRef('http://example.com/#loves'),rdflib.URIRef('http://example.com/#bob'))
(rdflib.URIRef('http://example.com/#alice'),rdflib.URIRef('http://example.com/#charlie'))
(rdflib.URIRef('http://example.com/#charlie'),rdflib.URIRef('http://example.com/#bob'))
 
Contexts
<http://example.com/context/#food> a rdfg:Graph;rdflib:storage [a rdflib:Store;rdfs:label 'IOMemory'].
<http://example.com/context/#love> a rdfg:Graph;rdflib:storage [a rdflib:Store;rdfs:label 'IOMemory'].
love context
(rdflib.URIRef('http://example.com/#bob'),rdflib.URIRef('http://example.com/#bob'))
food context
(rdflib.URIRef('http://example.com/#alice'),rdflib.URIRef('http://example.com/#pizza'))

python – 在rdflib中使用上下文

解决方法

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