add wdentity functions to entity

kgdata/models/entity.py

@@ -5,7 +5,9 @@
 
 from kgdata.misc.ntriples_parser import node_from_dict, node_to_dict
 from kgdata.models.multilingual import MultiLingualString, MultiLingualStringList
-from rdflib import Literal, URIRef
+from rdflib import RDF, Literal, URIRef
+
+RDF_TYPE = str(RDF.type)
 
 
 @dataclass
@@ -53,6 +55,16 @@ def apply_redirection(self, redirection: Mapping[str, str]) -> Entity:
             },
         )
 
+    def get_object_prop_value(self, prop: str) -> list[str]:
+        lst = []
+        for stmt in self.props.get(prop, []):
+            if isinstance(stmt.value, URIRef):
+                lst.append(str(stmt.value))
+        return lst
+
+    def instance_of(self, instanceof: str = RDF_TYPE):
+        return self.get_object_prop_value(instanceof)
+
 
 @dataclass
 class Statement:

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "kgdata"
-version = "6.1.0"
+version = "6.2.0"
 description = "Library to process dumps of knowledge graphs (Wikipedia, DBpedia, Wikidata)"
 readme = "README.md"
 authors = [{ name = "Binh Vu", email = "binh@toan2.com" }]