Hi,
I am having an issue (ValueError) when trying to destroy properties that are used within an "equivalent_to" axiom.
Here is a minimal example:
from owlready2 import get_ontology, destroy_entity, Thing, ObjectProperty
onto = get_ontology("
http://example.org/onto-ex.owl")
with onto:
class c_1(Thing):
pass
class c_2(Thing):
pass
class op_1(ObjectProperty):
pass
c_1.equivalent_to.append(op_1.some(c_2))
destroy_entity(op_1)
onto.save(file="./onto-ex.owl")
Adapting the destroyer function in prop.py (l. 903 ff) as follows seems to work:
def destroyer(bnode):
if bnode == e.storid: return
if undoer_bnodes: undoer_bnodes.append(bnode)
class_construct = e.namespace.ontology._bnodes.pop(bnode, None)
if class_construct:
for subclass in class_construct.subclasses(True):
if isinstance(subclass, EntityClass) or isinstance(subclass, Thing):
# subclass.is_a.remove(class_construct)
if class_construct in subclass.is_a:
subclass.is_a.remove(class_construct)
elif class_construct in subclass.equivalent_to:
subclass.equivalent_to.remove(class_construct)
Best,
Felix
Locked
