TypeError: expected string or bytes-like object in owlready library

Question

我正在尝试在我使用 owlready 库创建的 owl 文件中使用 python 查询数据。但是我收到以下错误。会是什么原因呢？

代码结构及接收错误如下

from owlready2 import *
from urllib.request import urlopen
from rdflib.graph import Graph

onto = default_world.get_ontology("http://muratkilinc.com/ontologies/izmir.owl").load()

graph = default_world.as_rdflib_graph()
r = list(graph.query_owlready("""
    PREFIX uni:<http://muratkilinc.com/ontologies/izmir.owl>
    SELECT ?adi ?soyadi ?yas
    WHERE
    {
        ?turistler uni:yas ?yas.
        ?turistler uni:adi ?adi.
        ?turistler uni:soyadi ?soyadi.
        FILTER(?yas > 35).

    }"""))

results = default_world.as_rdflib_graph().query_owlready(r)
results = list(results)
print(results)

错误：

* Owlready2 * Warning: optimized Cython parser module 'owlready2_optimized' is not available, 
defaulting to slower Python implementation
Traceback (most recent call last):
  File "c:/Users/BAUM-PC/Desktop/izmir/sparql.py", line 21, in <module>
    results = list(results)
  File "C:\Users\BAUM-PC\AppData\Local\Programs\Python\Python37-32\lib\site- 
packages\owlready2\rdflib_store.py", line 261, in query_owlready
  File "C:\Users\BAUM-PC\AppData\Local\Programs\Python\Python37-32\lib\site- 
packages\rdflib\graph.py", line 1089, in query
    query_object, initBindings, initNs, **kwargs))
  File "C:\Users\BAUM-PC\AppData\Local\Programs\Python\Python37-32\lib\site- 
packages\rdflib\plugins\sparql\processor.py", line 74, in query
    parsetree = parseQuery(strOrQuery)
  File "C:\Users\BAUM-PC\AppData\Local\Programs\Python\Python37-32\lib\site- 
packages\rdflib\plugins\sparql\parser.py", line 1057, in parseQuery
    q = expandUnicodeEscapes(q)
  File "C:\Users\BAUM-PC\AppData\Local\Programs\Python\Python37-32\lib\site- 
packages\rdflib\plugins\sparql\parser.py", line 1048, in expandUnicodeEscapes
    return expandUnicodeEscapes_re.sub(expand, q)
TypeError: expected string or bytes-like object

Answer 1

您必须跳过第二个查询，错误消息将被跳过

from owlready2 import *
from rdflib.graph import Graph

onto = default_world.get_ontology("http://muratkilinc.com/ontologies/izmir.owl").load()

graph = default_world.as_rdflib_graph()

r = list(graph.query_owlready("""
    PREFIX uni:<http://muratkilinc.com/ontologies/izmir.owl>
    SELECT ?adi ?soyadi ?yas
    WHERE
    {
        ?turistler uni:yas ?yas.
        ?turistler uni:adi ?adi.
        ?turistler uni:soyadi ?soyadi.
        FILTER(?yas > 35).
    }"""))

print(list(r))

它给出了空列表 - 因此它可以正常工作而不会出现错误消息。

空列表是不同的问题 - 查询，而不是代码 - 所以你应该问新问题。

TypeError: expected string or bytes-like object in owlready library

TypeError: expected string or bytes-like object in owlready library

python

sparql

semantic-web

owlready