我正在尝试学习使用 RDF，并尝试从 dbpedia 中提取一组事实作为我的学习练习。下面的代码示例有点工作，但对于配偶等主题，它总是会拉出他们自己的人。
问题：
- get_name_from_uri() 提取 URI 的最后一部分并删除下划线 - 必须有更好的方法来获取人名
- 配偶的结果拉回配偶但也拉回数据主体 - 不确定那里发生了什么
- 一些结果以 URI 格式和文本项的形式提取数据 -
这是代码块的输出，显示了我得到的一些奇怪的结果（请参阅属性中的混合输出，他与自己结婚的事实以及 Josephine 的错误名字？
Accessing facts for Napoleon held at http://dbpedia.org/resource/Napoleon
There are 800 facts about Napoleon stored at the URI
http://dbpedia.org/resource/Napoleon
Here are a few:-
Ontology:deathdate
Napoleon died on 1821-05-05
Ontology:birthdate
Napoleon was born on 1769-08-15
Property:spouse retruns the person themslves twice !
Napoleon was married to Marie Louise, Duchess of Parma
Napoleon was married to Napoleon
Napoleon was married to Jos%C3%A9phine de Beauharnais
Napoleon was married to Napoleon
Property:title retruns text and uri's
Napoleon Held the title: "The Death of Napoleon"
Napoleon Held the title: http://dbpedia.org/resource/Emperor_of_the_French
Napoleon Held the title: http://dbpedia.org/resource/King_of_Italy
Napoleon Held the title: First Consul of France
Napoleon Held the title: Provisional Consul of France
Napoleon Held the title: http://dbpedia.org/resource/Napoleon
Napoleon Held the title: Emperor of the French
Napoleon Held the title: http://dbpedia.org/resource/Co-Princes_of_Andorra
Napoleon Held the title: from the Memoirs of Bourrienne, 1831
Napoleon Held the title: Protector of the Confederation of the Rhine
Ontology birth place returns three records
Napoleon was born in Ajaccio
Napoleon was born in Corsica
Napoleon was born in Early modern France
这是产生上述输出的 python，它需要 rdflib，并且正在进行中。
import rdflib
from rdflib import Graph, URIRef, RDF
######################################
# A quick test of a python library reflib to get data from an rdf graph
# D Moore 15/3/2014
# needs rdflib > version 3.0
# CHANGE THE URI BELOW TO A DIFFERENT PERSON AND SEE WHAT HAPPENS
# COULD DO WITH A WEB FORM
# NOTES:
#
#URI_ref = 'http://dbpedia.org/resource/Richard_Nixon'
#URI_ref = 'http://dbpedia.org/resource/Margaret_Thatcher'
#URI_ref = 'http://dbpedia.org/resource/Isaac_Newton'
#URI_ref = 'http://dbpedia.org/resource/Richard_Nixon'
URI_ref = 'http://dbpedia.org/resource/Napoleon'
#URI_ref = 'http://dbpedia.org/resource/apple'
##########################################################
def get_name_from_uri(dbpedia_uri):
# pulls the last part of a uri out and removes underscores
# got to be an easier way but it works
output_string = ""
s = dbpedia_uri
# chop the url into bits devided by the /
tokens = s.split("/")
# because the name of our person is in the last section itterate through each token
# and replace the underscore with a space
for i in tokens :
str = ''.join([i])
output_string = str.replace('_',' ')
# returns the name of the person without underscores
return(output_string)
def is_person(uri):
##### SPARQL way to do this
uri = URIRef(uri)
person = URIRef('http://dbpedia.org/ontology/Person')
g= Graph()
g.parse(uri)
resp = g.query(
"ASK {?uri a ?person}",
initBindings={'uri': uri, 'person': person}
)
print uri, "is a person?", resp.askAnswer
return resp.askAnswer
URI_NAME = get_name_from_uri(URI_ref)
NAME_LABEL = ''
if is_person(URI_ref):
print "Accessing facts for", URI_NAME, " held at ", URI_ref
g = Graph()
g.parse(URI_ref)
print "Person Extract for", URI_NAME
print "There are ",len(g)," facts about", URI_NAME, "stored at the URI ",URI_ref
print "Here are a few:-"
# Ok so lets get some facts for our person
for stmt in g.subject_objects(URIRef("http://dbpedia.org/ontology/birthName")):
print URI_NAME, "was born " + str(stmt[1])
for stmt in g.subject_objects(URIRef("http://dbpedia.org/ontology/deathDate")):
print URI_NAME, "died on", str(stmt[1])
for stmt in g.subject_objects(URIRef("http://dbpedia.org/ontology/birthDate")):
print URI_NAME, "was born on", str(stmt[1])
for stmt in g.subject_objects(URIRef("http://dbpedia.org/ontology/eyeColor")):
print URI_NAME, "had eyes coloured", str(stmt[1])
for stmt in g.subject_objects(URIRef("http://dbpedia.org/property/spouse")):
print URI_NAME, "was married to ", get_name_from_uri(str(stmt[1]))
for stmt in g.subject_objects(URIRef("http://dbpedia.org/ontology/reigned")):
print URI_NAME, "reigned ", get_name_from_uri(str(stmt[1]))
for stmt in g.subject_objects(URIRef("http://dbpedia.org/ontology/children")):
print URI_NAME, "had a child called ", get_name_from_uri(str(stmt[1]))
for stmt in g.subject_objects(URIRef("http://dbpedia.org/property/profession")):
print URI_NAME, "(PROPERTY profession) was trained as a ", get_name_fro m_uri(str(stmt[1]))
for stmt in g.subject_objects(URIRef("http://dbpedia.org/property/child")):
print URI_NAME, "PROPERTY child ", get_name_from_uri(str(stmt[1]))
for stmt in g.subject_objects(URIRef("http://dbpedia.org/property/deathplace")):
print URI_NAME, "(PROPERTY death place) died at: ", str(stmt[1])
for stmt in g.subject_objects(URIRef("http://dbpedia.org/property/title")):
print URI_NAME, "(PROPERTY title) Held the title: ", str(stmt[1])
for stmt in g.subject_objects(URIRef("http://dbpedia.org/ontology/sex")):
print URI_NAME, "was a ", str(stmt[1])
for stmt in g.subject_objects(URIRef("http://dbpedia.org/ontology/knownfor")):
print URI_NAME, "was known for ", str(stmt[1])
for stmt in g.subject_objects(URIRef("http://dbpedia.org/ontology/birthPlace")):
print URI_NAME, "was born in ", get_name_from_uri(str(stmt[1]))
else:
print "ERROR - "
print "Resource", URI_ref, 'does not look to be a person or there is no record in dbpedia'