IndexError:列出索引超出范围的本体注释

Question

我正在使用以下代码向本体添加注释

from owlready import *
onto = get_ontology("C://Users//sharm//Documents//ISWC2020//Ontology_read_play//Covid_v1.owl")
ANNOTATIONS[Thing].add_annotation("comment", "My comment")
onto.save()

然后，当我使用.save((保存它时，它会显示一个IndexError

IndexError Traceback (most recent call last)<module>
--> onto.save()
C:ProgramDataAnaconda3libsite-packagesowlready__init__.py in save(self, filename)
282     owl = to_owl(self)
283     if filename: f = open(filename, "w")
--> 284     else:        f = _open_onto_file(self.base_iri, self.name, "w")
285     print("* Owlready * Saving ontology %s to %s..." % (self.name, getattr(f, "name", "???")), file = sys.stderr)
286     f.write(owl)
C:ProgramDataAnaconda3libsite-packagesowlready__init__.py in _open_onto_file(base_iri, name, mode, only_local)
199     if os.path.exists(filename): return open(filename, mode)
200   if (mode == "r") and not only_local: return urllib.request.urlopen(base_iri)
--> 201   if (mode == "w"): return open(os.path.join(onto_path[0], "%s.owl" % name), "w")
202   raise FileNotFoundError
203 
IndexError: list index out of range

Answer 1

快速搜索单据(https://pythonhosted.org/Owlready2/onto.html)显示，如果您没有在save方法中指定文件或文件名，它将使用onto_path模块变量中的第一个路径。您从未设置它，显然onto_path开始为空。

在save方法中添加适当的name参数，并在下次出现问题时签出文档。